New
September 12, 2025

From Kant to Turing: The Boundaries of Reason and Infinite Approximation

I. Kant: Setting Boundaries

Kant’s “Copernican Revolution” revealed the boundaries of human reason. He used “glasses” as a metaphor:

  • Phenomenal world = Cognizable
  • Thing-in-itself = Incognizable

Reason constructs the experiential world through categories and intuition, but cannot directly grasp the thing-in-itself. The Critique of Judgment further explains the “bridging method” between phenomena and the thing-in-itself, but this is not intuitive cognition, rather a possibility of connection.

II. Hegel: Breaking Boundaries

Hegel was dissatisfied with Kant’s “boundary theory.” He proposed dialectics:

  • Contradiction drives the development of reason
  • Negation of negation = Transfinite iteration
  • Reason continuously polishes the glasses through “sublation” (Aufhebung).

Hegel’s conclusion is: the Absolute Spirit can ultimately make the glasses 100% transparent, and the thing-in-itself fully manifest. In other words, he believed reason would eventually break through the limits set by Kant.

III. Gödel and Turing: The End and Transcendence of Formalization

Gödel and Turing transformed philosophical problems into mathematical logic and computation theory.

  • Core correspondences: Formal system = Kant’s phenomenal world
  • Completeness = Thing-in-itself
  • Consistency = Non-contradiction
  • Computability = Cognizable

Key results: Gödel’s incompleteness theorem: Any sufficiently powerful and consistent system must be incomplete → Kant’s “glasses” become formalized into a theorem.

  • Turing machine: Strict formalization, finite computability → Corresponds to Kant’s phenomenal world.
  • Oracle machine: A decision-making bridge beyond the system → Corresponds to Kant’s Critique of Judgment.
  • Ordinal logic system: Transfinite iterative boundary expansion → Corresponds to Hegel’s dialectical logic.
IV. A Unified Picture
  • Kant: Setting boundaries
  • Hegel: Approaching boundaries
  • Gödel/Turing: Proving that boundaries cannot be eliminated, but allowing infinite approximation, while introducing an external oracle perspective

The logical chain can be understood as follows:

  • Kant — Setting the boundary
  • Hegel — Attempting to break the boundary
  • Gödel/Turing — Proving the boundary’s real existence, but expansion paths and external oracles remain possible

V. Conclusion

This chain of thought shows:

  • Kant = The boundary setter
  • Hegel = The dialectical expander
  • Gödel/Turing = The formal proof-givers

From philosophy → to logic → and then to computation, human reason always unfolds between finitude and infinite approximation.