Kant's Critique of Pure Reason: Understanding the Dialectic
The Transcendental Dialectic: Reason's Illusion
The Transcendental Dialectic is the central theme of Kant's critical philosophy. Here, Kant begins to resolve the problem of the transcendental illusion by analyzing the subjective principles of pure reason.
The Three Faculties of Knowledge
This section addresses the third faculty of our knowledge: Reason. All knowledge stems from the senses, is processed through the understanding, and culminates in reason. Reason has two primary uses: logical and pure.
Logical and Pure Uses of Reason
By logical reason, we minimize the multiplicity of empirical knowledge provided by the understanding. Logically, there are three types of reasoning:
- Categorical
- Hypothetical
- Disjunctive
Reason produces three corresponding types of synthesis (categorical, hypothetical, and disjunctive). However, reason never reaches a unique and total synthesis based purely on experience.
The Ideas of Pure Reason (Soul, World, God)
The temptation of reason is to jump beyond the empirical series and produce a total synthesis through pure concepts of reason, which Kant calls the Ideas. The logical function of reason is always to unify multiple individual pieces of knowledge into universal units. This drive constitutes the pure use of reason.
The three momentous Ideas of pure reason are:
- The Self (Soul)
- The World (Cosmos/Universe)
- God
For Kant, it is inevitable for humans to engage in metaphysics. The synthetic function of the understanding is legitimate when carried out on elements given by experience, but pure reason attempts synthesis beyond experience.
The Illegitimate Jump: Seeking the Unconditioned
This illegitimate attempt at total synthesis produces the concepts of the Soul, the Universe, and God. The phenomenon of "cause and effect" shows that every condition is itself conditioned. Reason, however, tends to find something unconditioned. This jump is illegitimate; it is the illusion of pure reason. Kant demonstrates that dogmatic metaphysics is fundamentally a set of illusions.
The Limits of Metaphysical Knowledge
Kant first demonstrates that the concept of the Soul cannot yield scientific knowledge (Paralogisms). He also rejects the metaphysical construction of the Universe (Antinomies), which arises when reason seeks to show the totality of conditions, often resulting in contradictory claims.
The result of the Transcendental Dialectic is to point out the fundamental error of metaphysics: attempting to know things that transcend experience. These three syntheses cannot be experienced phenomenally because they do not belong to the world of experience (the phenomenal realm). Knowledge requires starting with sensibility and applying a priori concepts to objects that can be experienced. If they cannot be experienced, they cannot be known.
We must, therefore, admit that the Ideas of pure reason are necessary a priori functions of reason itself. Kant denies dogmatic metaphysics, but he does not deny the existence of metaphysical realities (Noumena). On the contrary, Kant takes a major step by eliminating the terrible problem of rational knowledge claiming certainty about the Soul and other metaphysical objects.
Securing Metaphysical Reality through Practical Reason
Kant finds peace by establishing other paths to the knowledge of God (specifically, through moral or practical reason), thereby removing God from the realm of scientific discussions. The existence of God is secured through arguments based on morality, placing it beyond the reach of theoretical scientific problems. Kant's intention, though perhaps misunderstood, was undoubtedly good.