Critique of Pure Reason by Immanuel Kant [Book Summary – Review]


What is the nature of space and time? Is the world controlled by the law of cause and effect and provided that this is true, why? These are only two of the captivating inquiries that Kant brings up in the Critique of Pure Reason. His answers are intriguing, progressive, and even out and out incredible. 

Shockingly, they’re likewise covered in 856 pages of probably the most impervious prose at any point composed. Kant himself portrayed it as “dry, obscure, opposed to all ordinary notions, and also long-short of breath.” Even Kant Scholars are uncertain of how to comprehend the critique’s unimaginably entangled arguments, and they’ve advanced many contending understandings. 

Considering these realities, this summary can just present an understanding of a portion of Kant’s fundamental thoughts, skirting numerous specialized subtleties. Luckily, the vast majority of these subtleties are of intrigue just to researchers. For all of us, the gist of Kant’s ideas gives all that could possibly be needed food to thought.


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Chapter 1 – Before they construct a metaphysical system, thinkers should evaluate the origin and nature of our minds’ psychological materials.


Imagine you’re a construction worker making a life in the medieval period. One day, the king asks you to come to the construction area. He shows a giant pile of building materials and utters, “I want you to turn this into a tower that reaches heaven – or as close as possible, at least.” What are you going to do?

Actually, you must start by making a search in the materials. From what are they made? How powerful are they? By giving replies to these questions, you will have the ability to tell how long you might construct the tower. The alternative is to just start building and hope for the best a receipt for calamity when you finally end up going more than the materials could handle. 

An identical opinion can be applied for thinkers if they have a desire for building a metaphysical system.

Metaphysics is the part of philosophy that attempts to increase our understanding of the world into the loftiest realms of men’s inquiry. By having the theoretical concepts and rational concepts of reason, it tries to go further than the experimental proof of the natural sciences and acquire the eventual nature of reality.

Think about the time, for example. Does it have a starting point? Maybe, rather, does it goes back to eternity? Those are the instances of metaphysical inquiries. Give replies to a couple of them, put your replies together to a well-reasoned body of ideas, then you have a metaphysical system.



From the initial days of former Greece, a lot of philosophers have tried to construct various metaphysical systems. But before of the Critique of Pure Reason, a great number of them attempted to do so by not first searching into the beginnings and nature of our brains’ mental materials. They just took the conceptions and logical concepts they had available and started constructing with them.

Yet are these matters indeed suitable for the duty of metaphysics? Also if that is the case, how tall do they let us construct our metaphysical towers when we speak about it? On the condition that reply is “all the way to heaven,” then fine construct that. Yet if it’s “not very far,” then we must keep ourselves close to the earth satisfying ourselves with the more boring understanding of the sciences, as leaving the more esoteric things to religion.

One way or another way, we have a necessity to be informed about the reply beforehand. Or else, we are going to be at risk of constructing a tower that will fall down into pieces on our feet.


Chapter 2 – To escape from the risk of metaphysical dogmatism, thinkers should make a critique of pure reason.


Okay, then our metaphysical tower may come crumbling down when we don’t search about the mental materials we’re going to construct it out of. Yet then what? At the end of the day, it’s not a real, cement tower. It’s only a couple of ideas. Not anybody is going to get discomfort when it crumbles down. Then why not just construct and see what will occur?

Since this is not a very philosophical take on, indeed, it might be the reverse of philosophy which is the thing called dogmatism.

Between other things, philosophy is nothing but giving our thoughts to critical scrutiny. Let’s imagine you are convinced that you have freedom. Then, why do you think that way? It might be since you believe people need to be free in terms of thinking to be ethically held accountable. All right, yet for what do you think that?

The more people unwrap the main premises of our beliefs and dare them to see whether they stand with scrutiny on the same page, the more we’re doing philosophy. In contrast, the more we do not appreciate our premises, the more we’re getting in touch with dogmatism – the rival of philosophy.

At the moment, when we only jump into the building without doing anything, a metaphysical structure without first knowing the mental materials we’re going to construct it from, we’re underestimating the assumption that our materials are applicable for the task. It might be that they are, or maybe they are not yet both ways, we don’t know, then our premise is thereby not justified. We’re therefore being dogmatic for our skill to carry out metaphysics.



To escape being dogmatic, we have to critically take this ability into the examination. Do we have that, even? Also provided that that is the case, from what does it emerge from? Actually, it cannot come from our senses, since those could only give us experimental knowledge about the real world, not metaphysical information and that goes further than the experimental, physical realms of science. Therefore, it will be in need of coming solely from our capability to get in touch with reason maybe even pure reason, if we summarize.

Therefore, to escape from dogmatism, we should give our capability as the only thing to critical scrutiny. Is it enough to grant us metaphysical information? If that is the case, how and how long extent? We can regard that kind of critical project as a critique. So we can, thereby, claim that we have a necessity to get into a critique of pure reason.


Chapter 3 – By failing to escape from the risk of dogmatism, philosophy pushes the spanning of skepticism.


In case you’re a philosopher, dogmatism is one of the most exceedingly terrible accusations possible. Be that as it may, in case you’re only an ordinary individual, you may shrug your shoulders. So consider the possibility that we go on metaphysical flights of fancy. Once more, we’re simply managing abstract ideas about esoteric subjects here, so what’s the serious deal? 

The issue is that dogmatism can engage another foe of philosophy: skepticism. What’s more, this one doesn’t simply imperil philosophy, however all human knowledge by and large. 

It’s anything but difficult to feel skeptical about metaphysics. All things considered, it doesn’t appear to gain ground the manner in which different disciplines do. With the empirical sciences, we can see a clear evolution from the ancient greeks to current occasions. In the interim, philosophers are as yet contending about a significant number of very similar things Plato and Aristotle argued around a huge number of years back. 

In retrospect, it’s anything but difficult to perceive any reason why there’s been such a great amount of space for disagreement. Without having occupied with a critique of pure reason, philosophers were allowed to dogmatically progress pretty much any contention they needed to make. 

The anticipated outcome? An interminable clash of contradictory claims. There must be a type of God who made the universe; else, it couldn’t exist, contends one philosopher. Babble, says another; the universe could have made itself. 



With so much persevering difference about even the most fundamental metaphysical issues, it’s enticing to shrug our shoulders and state, “Well, I guess nothing can be known about metaphysics.” But recall, metaphysics is the space of pure reason. Setting aside mathematics, which we’ll return to later, every other control of information depends on the exact proof gave by the faculties. On the off chance that it’s feasible, magical information must be gotten to through pure reason. 

Be that as it may if pure reason can’t get a handle on the very thing it would appear to be most appropriate for, what great right? Also, if our most elevated faculty is pointless for knowing the most essential parts of the real world, how might we confide in our lower resources about the specialized subtleties? Maybe our faculties delude us. Assuming this is the case, our obviously uncouth explanation would appear to be not able to act the hero. 

Furthermore, all things considered, we may be tempted to shrug our shoulders one final time and state, “Well, I guess we can’t really know anything about anything then.”


Chapter 4 – Not only religion but science, as well, rely on metaphysical concepts and that makes skepticism a peril for both of them. 


For the ones like us, having a life in the time of “fake news” and “alternative facts,” the issue of skepticism is the thing we’re thus far engaged with. In eighteenth-century Europe, at the time Kant was writing, it felt like a peril, as well, yet for different things.

Science was rising over the top, and ascending skepticism in terms of metaphysics meant mounting skepticism about religion, as well. Yet this skepticism goes two of the ways, also it was starting to underestimate the creation of science, too.

Let’s begin with religion. A lot of religious ideas rely on metaphysical notions. They’re nothing but concepts such as God and the soul the things that are assumed to live in some kind of immaterial, beyond-the-physical even more, to illustrate, metaphysical a domain of being.



In definition, that domain is further than the availability of the senses. We are never going to see God in a telescope, a soul in a microscope, or some other metaphysical being by any other mediums of experimental monitoring. Yet when reason is not able to know something about them, as well, all beliefs like that would end up being nothing to support, in other words, would be unsupportable.

As long as knowledge makes its way, this would seem to depart us with only the cold, hard truths of science and the laws they set up in terms of the corporeal world in all of these, the law of causality. This law is in the middle of science. It claims that for all of the given events, there should be other events which make it take place. All phenomena are thereby only an issue about cause and effect, also science’s quest is to find out the little bits of nature’s variable causal mechanisms. Gravity, the conservation of matter, you can name anyone of them every one of those specific laws of science requires the main law of causality.

Yet here’s the issue: our idea of causality is itself a metaphysical notion. It’s an idea about a feature of reality that we could never perceive straight. Nevertheless, we suppose it has a quintessential role in shaping the way the world works.

Now, actually, the Scottish thinker David Hume made a claim that vastly impacted Kant’s way of thinking. It is something like that: when we just center on the proof supplied by our senses, all of the things we see are diverse things that occur in connection with each other. In the beginning, you turn on the stove. After that, the water simmers. If you see this occurring a couple of times, you might claim that one notion is prone to come after another, and that makes a pattern narrating these events.

Yet this is not similar to uttering one of them should follow the other one and that creates a law ruling these instances. You might presume the pattern would continue to stay true and take action like a law. Yet depended on the confirmation of the senses only, this is an unjustified presumption.


Chapter 5 – If the reason is not able to supply us with a priori knowledge, so that means it is not able to secure our information of mathematics either. 


From the notion of God to the idea of causality, every single one of the metaphysical concepts of religion and science is from now on at risk. Yet this is not everything. The similar simple claim that applies to metaphysical conceptions applies to a thing named as a priori knowledge, as well.

You might ask what is that about? Well, the simple reply is that it’s quite an important thing. Mathematical knowledge relies on it, that’s why no math is in trouble, as well.

When we utter we know a thing that is a priori, this is a cool Latin option of saying we know it’s real independently of our experience. For example, think about the equation 7 + 5 = 12. This tiny bit of arithmetic is something of a priori knowledge. Yet to acknowledge why we’re going to be in need of unpacking it a little.

So innocuous as it may seem, an equation like 7 + 5 = 12 is indeed making an astonishingly bold argument regarding reality. In saying it as the truth, we’re not only gently claiming that 7 + 5 looks like to equal 12, is prone to equal 12, or has equaled 12 in every possibility we know about.

Indeed, we’re audaciously claiming that 7 + 5 should equal 12, however, when or where we’re summing the numbers in question up. It is not the matter when we’re adding 7 + 5 sausage dogs in eighteenth-century Germany, small and tiny green aliens on twenty-third century Mars, or pink elephants in the clouds in our contemporary thinking. The sum of 7 + 5 should every time and every possibility equal 12.



Let me put it this way, the equation is automatically and globally the truth. But as we’ve seen with causality, knowledge never garnishes us with the idea that one has to succeed in him another one. It only demonstrates us instances of one thing being prone to pursue another. From those tendencies, we could only infer patterns from them, laws cannot be inferred from them.

As a principle, so, we are able to claim that if we are aware of something is automatically and globally true, our knowledge could not be inferred from experience. By the meaning of it, which means; it should be a priori. And if it doesn’t derive from our experiences, so that puts us between two possibilities: one possibility is; it comes from our capability of reasoning, in that case, it would be secure. Second possibility; it’s only a creation of our imagination, in that possibility it couldn’t be knowledge by any means.

Yet how would it derive from reason? This is the matter.


Chapter 6 – A priori knowledge isn’t natural knowledge; that is the knowledge which the mind creates through its own mechanisms in it.


We’ve progressed significantly in our journey, so how about we recap: If it’s feasible for us to increase metaphysical knowledge, it couldn’t be empirical knowledge gotten for a fact. It would need to be from the earlier knowledge we got from Reason. So now we’re searching for a method of picking up that. 

In any case, is from the earlier knowledge even conceivable? All things being equal, its possibility appears to be counterintuitive and even downright preposterous. What’s it inferring? That we realize things like mathematical equations before we have any experience of the world? That we’re some way or another brought into the world with this knowledge? 

This isn’t exactly the situation. There’s a significant contrast between innate knowledge and from the earlier knowledge, and it’s pivotal to understanding the contentions that follow. 

How about we go back to our equation: 7 + 5 = 12. Sooner or later in our lives, we were shown this condition, and we built up our insight into math over numerous long periods of training. At the end of the day, we obtained our knowledge with regard to a type of understanding, for example, being at school. In this and every other case, we can, hence, state that our experience chronologically goes before our knowledge. 



Yet, that doesn’t really imply that our insight emerges for a fact from a causal perspective. To perceive any reason why to consider consciousness the result of powers meeting each other from two headings. On one side, we have the sensitive information we get from our sense organs sounds, smells, images, and things like that. On the opposite side, we have the inward components through which our psyche forms that information creating our perceptions, concepts, decisions, etc. Get the different sides associating, and you have consciousness. 

In soliciting whether a piece from information is from the earlier, we’re basically soliciting: which side of the condition does it originated from? Our sense information, our psyches’ internal mechanisms, or a touch of both? On the off chance that the appropriate response is that it’s only a result of our brains’ internal mechanisms, at that point that information would be from the earlier. While it would even now be chronologically gone before by understanding, it wouldn’t emerge from or rely upon that experience. It would be a piece of the commitment that our brain itself brings to the table of consciousness.


Chapter 7 – Our mind can be separated into three centers of faculties; sensibility, understanding, and reason.


There is also a way of thinking concerning a priori knowledge: of course, the mind’s mental machinery wouldn’t start speeding up its wheels unless it had sensitive data to consume. Yet for the time being, that data wouldn’t be worked on when the machinery wasn’t standing ready there to analyze it.

For instance, when you were a toddler, maybe you needed the formula 7 + 5 = 12 written on a chalkboard in order to bring it to your attention. Yet still, your brains’ mental machinery had a necessity to readily have a way of understanding it in a way to obtain information on that universal and important truth.

If we gave attention to this equipment and its inner operations, we can, theoretically, create or make a priori knowledge. Our brains would just require to look back inwards and get to know of themselves. No experience is required for that.

To follow this theory, we’ll be in need of rolling up our sleeves and inquire about the brain’s psychological machinery. What kinds of mechanisms it has and in what way do they operate? Let’s have a look. 

As the name of it proposes, delicacy is our capability to have sensations – the type of things such as sound, heat, texture, and you can add more to the list. Let’s assume you are trying to find it at home. Your visual image eventually is made up of many sensations of color and shape. Those sensations, in turn, are the outcome of your senses being influenced by external objects. When the light gets your eyes in a particular way, you have a sensation of red.



So, isolated sensations of concepts such as color and shape aren’t so efficient in and of themselves. We are in need of being able to change this raw data to significant information that we might act on. Also, this brings us to our following mental facility: understanding. This is our brain’s skill to create concepts from sense data and that lets us make our own judgments regarding the universe.

For instance, by many experiences, you can ultimately create concepts about dogs and happiness. You could, after that, mix those concepts to create judgment and that claims a rational relationship between two or even more than two things. For example, “if a dog is wagging its tail, it is happy.” This judgment claims an if-then rational relationship in and between the notions at issue.

Lastly, when you connect more than one propositional judgments to each other, you have a rational syllogism – a loop of reasoning. Here’s the place the facility of reason gets into the play. To maintain the example before, you can reason through the next lines: “If a dog is wagging its tail, it is happy. This dog is wagging its tail. Therefore, it is happy.”

So, these are the vast outlines of how and in which way our own brain works. We’ll have a look at more features in the chapters following what we just mentioned.


Chapter 8 – To organize sense data into meaningful information, the mind needs predefined ways of structuring them.


Some of the ideas we’re going to discover get a little complicated, but the basic one laying under them is quite simple. It’s the idea that the mind isn’t just a passive recipient of sense data, as if it were a tabula rasa. Indeed, it has an important role in making data into meaningful information about the world.

How actually does it apply that? Indeed, this is where things are getting sophisticated – specifically when we dive into the details. Yet again, the main ideas are quite straight.

To understand why let’s go back to the instance of a house. As you look at it, you see a couple of colors and shapes concerning the roof, windows, mailbox, so on. Yet they do not seem as something jumble. Rather, you get the idea that the roof is on top of the windows, whilst the mailbox is next to the door. In other words, you see these images occupying varying positions in a connection to each other.



Those spatial relationships make the sensory part of your experience and let it have a form. It can also be said that they define the shape of this content the possibility the unique constituents of it are put in connection with each other. When the windows were on above the roof, actually, you’d have a quite weird house – and the shape of your experiences’ sensory parts could be fairly non-similar.

So, all of those spatial things and links assume one particular thing: molding space own self. And therefore, to be capable of perceiving a thing as being in any spatial position or relationship or anything, our brain should have a structure of space to fit it in readily, before facing the object.


Chapter 9 – Time and space are real forms of sensibility and these supply the mind with schemes for ordering sense data.


Envision if your mind didn’t have a framework of space wherein it could sort out the substance of your sensory experience. You’d see a patch of shading; suppose blue. And afterward well, that is it. You were unable to see another patch simultaneously, in light of the fact that there wouldn’t be any space wherein they could be co-present. Space is the thing that permits these sensations to be all the while part of a similar field of vision. 

Given how essential space is to our psyches’ capacity to compose our sensitive information, we can consider it an unadulterated type of sensibility. That is a shorthand method of saying that as a system for arranging our sensations, space exists in the brain on a “Pure,” a priori basis. As such, the brain as of now has it prepared within reach, before experience. It resembles a preprogrammed layout the psyche can use for organizing its information. 

Other than space, there’s just a single another pure type of sensibility: time. 

How about we return to our case of the house. As you’re taking a gander at it, you don’t simply observe the rooftop over the entryway (a spatial relationship). Contingent upon what you’re looking like at it, you’ll either observe one of the highlights before you see the other, at two unique minutes – or you’ll see them together, at a similar second. In any case, there’s a hidden temporal relationship between your visual sensations. You experience them either at the same time or consecutively. Furthermore, the equivalent goes for the entirety of your different sensations; inside your general understanding of reality, every one of them happens either at the same time or successively comparable to one another. 

These temporal connections are fundamental parts of the manner in which your experience of the truth is organized. On the off chance that they all got stirred up, you’d wind up having an altogether different encounter. You’d see some truly odd things, similar to individuals aging backward and items being in two places simultaneously! 



Be that as it may, all together for your sensations to have different temporal relationships with one another, there should be a hidden continuum of time wherein they can occur. Time is subsequently the general framework that makes them conceivable. The thing more than that is, so as to apply that framework to your sensations, your brain needs to have it prepared nearby, before experience. 

Like space, time is along these lines another unadulterated type of sensibility. It’s a basic part of the structure of our sensory experience. All that we experience happens inside reality, and in this manner presupposes them. They in this manner not just precede understanding; they make out experience conceivable. 


Chapter 10 – Our psyches likewise contain templates for understanding and reasoning about the world. 


By taking a gander at the conventional components of our psyches’ sensory substance, we had the option to distinguish space and time as the unadulterated types of sensibility. Be that as it may, sensibility is only one part of the psyche; shouldn’t something be said about comprehension and reason? 

Keep in mind, these are the mental faculties that empower us to additionally arrange our sense-information into ideas, decisions, and coherent syllogisms. In the event that we center on their conventional components, we’ll have the option to distinguish the pure types of comprehension and reason too. 

We should begin with a case of a judgment: “if something Is left In the sunlight, It will, in the end, get warm.” Now, on the off chance that we disregard the substance of this judgment and simply center on its proper structure, we end up with something we could symbolize as follows: “On the off chance that X, at that point Y.” 

On a Formal level, it doesn’t make a difference what we put into this equation; regardless of whether it’s atoms or unicorns, a similar essential intelligent relationship applies to every one of them. “In the event that X, at that point Y” gives your brain a Basic format to follow. It resembles a formula that says, “Hello, mind, here’s a single direction you can connect things together.” 

In progressively complex language, we can call this an intelligent capacity of understanding. “On the off chance that X, at that point Y” is known as a hypothetical function, since it attests a hypothesis about X. Here’s another model: “X Is Either Y or Z.” This is known as a disjunctive capacity since it affirms a disjunction an either/or plausibility between X being Y or Z. 



With these logical capacities close by, we would then be able to frame consistent syllogisms. These likewise have fundamental structures, which we can call standards of thinking. For instance, think about the accompanying syllogism: “An animal is either alive or dead. This creature isn’t alive. Thus, it is dead.” This appears as: “X is either Y or Z. X isn’t Y. In this manner, it’s Z.” 

These intelligent functions and thinking standards are the absolute most essential ways the psyche can combine thoughts. Also, in light of the fact that they’re so fundamental, the brain must come pre-equipped with them. Something else, how might it be able to ever even start to interface thoughts together? It would need to begin associating them before it had any method of interfacing them, which is inconceivable. To begin, it needs a preset template to follow. 


Chapter 11 – The psyche can utilize its templates to gain from earlier knowledge and ideas. 


Our excursion has now benefited us. We’ve experienced the standards of reasoning, the consistent functions of understanding, and the unadulterated types of sensibility otherwise called space and time. We’ve skirted a few subtleties en route. For instance, Kant distinguishes 12 legitimate capacities and three standards of reason altogether. Be that as it may, the ones we’ve secured will accomplish for our motivations. 

We’re currently prepared to come back to our inquiry: How is from the earlier knowledge conceivable? 

How about we start with reality? By examining these unadulterated types of sensibility, we can increase from the earlier knowledge of arithmetic. For instance, think about geometry. What is a geometrical figure, for example, a circle? It’s essentially a type of a potential item in space. It communicates a property of that space – to be specific, what happens when you take a line, and move it around a fixed point. 



By contemplating their own intelligent capacities, our psyches can frame a considerable lot of the traditional ideas of metaphysics. We can consider these ideas the classifications of understanding, and there are 12 of them altogether, comparing to the 12 intelligent functions. Notwithstanding causality, they incorporate the ideas of unity, plurality, existence, and possibility. 

In any case, the subtleties aren’t critical to comprehend the fundamental point, which is this: these concepts are the aftermath of the psyche directing internal and paying concentration toward itself. Every one of them portrays a way we cause judgments about the world a route we to associate things together in our brains. 

Accordingly, they’re a priori concepts. We needn’t bother with any understanding to frame them.


Chapter 12 – As long as we could know, the categories of understanding only mirror our own knowledge of reality, not a reality in itself.


Quite clear and so far so good, isn’t it? Hold tight, the claim goes even farther. Not only are we not in need of any knowledge to create the concepts that consist of the branches of understanding; those concepts aid to make our experience plausible in the first possible time.

That’s since the conscious experience isn’t solely a couple of feelings in time and space. It’s a mix of these feelings and the notions we have regarding them. Those notions, actually, are a concern of making links between the various feelings and notions in our minds. For instance, you don’t just see a round thing; you regard it as a bowling ball. Your brain makes a relation between the scene before you, which is the round object, and the concept which is the bowling ball.

The branches of understanding are the most fundamental way of creating such relations. We couldn’t make any relations and thereby couldn’t have any knowledge without having them. As it can be inferred from that fact, we might draw a far-reaching finish.

Assume that you’re taking a gander at a bowling ball lying on a cushion, making a downturn underneath it. Utilizing the classification of causality, your psyche interfaces these two wonders together as far as a causal relationship: the bowling ball causes the downturn. 

However, notice the words we are utilizing here: your psyche interfaces the two things together. At the end of the day, causality is something your psyche builds; it’s something your brain embeds into its experience of the real world. It’s your brain’s method of understanding the world. Things simply don’t sound good to it until it’s placed them into a causal request. 

However, that implies there’s an undeniable explanation your brain sees causality wherever it looks: it’s continually deciphering things that way! Truth is told, it must decipher them that way; it’s one of the essential manners by which it’s been modified to comprehend the world. 



The way that the psyche must decipher things along these lines discloses why causality appears to us as a law. It is a law – a law of the manner in which our psyches experience reality. To encounter reality, the brain must have the option to interface things together in different manners – incorporating them into one brought together, cognizant experience. Connecting things regarding circumstances and logical results are one of the fundamental ways it does this. 

We would thus be able to state with assurance that reality truly shows a law of causality – yet just to the extent that we experience it. Concerning reality in itself, that we can’t state. 

Furthermore, a similar contention applies to the entirety of different classifications. 


Chapter 13 – We can’t know the slightest bit about reality in itself – even whether it exists in space and time. 


On the off chance that you’ve made it this far, the difficult work of following these contentions is going to pay off. We’re presently showing up at one of the most shocking, progressive, and stunning thoughts throughout the entire existence of Western Philosophy. 

Are you a game? Here we go. Three, Two, One… 

To perceive any reason why to envision if space existed in outer reality precisely as we customarily consider it. It has three measurements: width, height, and depth. Okay, presently envision if your brain had an alternate type of spatial sensibility one that some way or another changed that three-dimensional reality into something with two, five, or ten measurements. All things considered, you’d see the world as having two, five, or ten measurements. Or then again suppose you didn’t have any type of spatial sensibility at all. At that point, you wouldn’t see any measurements whatsoever. 



At the end of the day, regardless of whether outer reality exists in three-dimensional space, our brains would at present need to place their sensations into a three-dimensional spatial framework to see them all things considered. Also, to do that, they would need to have that framework prepared within reach before any sensations got separated through it. On the off chance that our psyches had an alternate framework, they’d get separated in an unexpected way, and we’d, subsequently, see them contrastingly too. 

The equivalent goes for time – and here comes the kicker. On the off chance that we needed to affirm that existence was likewise parts of external reality in itself and not simply our inward experience, where might we look? Our sensations, obviously – at last they’re the main proof we have of that reality. Be that as it may, when they arrive at our conscious mindfulness, we’ve just sifted them through our psychological structures of existence, alongside the classifications of our comprehension. 


Chapter 14 – The reason ought not to wander into Metaphysical Speculation about the idea of reality in itself. 


So pause, would we say we are stating that time, space, and causality don’t exist in an external reality that they exist just in our psyches? Not really, This is an extremely prickly issue inside translations of Kant’s idea, so we should simply go with the most secure one here. 

The most secure understanding is that we simply don’t have the foggiest idea. Perhaps time, space, and causality do exist in external reality, and our brains precisely reflect them. Or then again perhaps they don’t, and they’re only the formats of our sensibility and understanding. The fact of the matter is that we essentially can’t reveal to one way or the other. Any place we look, we’ll generally observe things as far as the frameworks of time, space, and causality that our brains have just forced on our sensitive information. 

That is the most unobtrusive variant of the contention. Be that as it may, even in this structure, it has far-reaching suggestions. 

Because of the types of sensibility and the classes of comprehension, we can know a ton about the world as we experience it. For example, the facts of geometry truly portray the idea of the room in that world. The law of causality truly portrays the way that situations develop in that world. The thing that is more than that is, something very similar goes for the entirety of the sub-assortments of that law, for example, the laws of motion. They additionally depict the manner in which things occur in that world. 



In any case, the watchwords here are “in that world.” As far as we probably are aware, these facts and laws just apply to the world as we experience it – the universe of phenomena, as Kant calls it. Concerning what the truth resembles all by itself – the universe of noumena – that we can never know. All things considered, we can just know reality to the extent that we experience it. And by the time we’ve experienced it, our minds have already shaped the mental materials of our sensibility and understanding in so many fundamental ways that we are no longer in a position to say anything about reality in itself.

But those materials are all that reason has to work with. And that leaves reason unable to know the ultimate nature of reality in itself. It can help us to think about the physical world of phenomena, but it can only speculate about the metaphysical nature of noumena. If it tries to go beyond its limits and enter that mysterious realm, it can only spin arguments; it cannot gain knowledge.


Critique of Pure Reason by Immanuel Kant Book Review


The human mind has an active part in molding its own experience and coherence of reality. To be in that role, it requires frameworks for making sense of data, concepts, and judgments into a coherent drawing of the world. Since those templates are not external to the mind, and since we could never perceive or recognize reality without them, we are not able to know whether they reflect the nature of reality as it exists in itself, independently of our minds. Those things uncover the chance that reality in its own context is fairly not the same as our experience of it. It as well creates metaphysical theories of that reality an affair of simple and real speculation. We must, thereby, stick to scientifically recognizing the empirical realm whilst letting the metaphysical realm for religion.



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Savaş Ateş

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