The Critique of Pure Reason, Part 3, Section I summary
Part 3, Section I of 79 · Part 2: Transcendental Logic · 3 min to read the section
In Section I, the argument establishes that freedom from contradiction is necessary for every judgment but sufficient to establish truth only in analytic cognition. It then rejects a formulation involving time, showing that an analytic judgment rests on what the subject concept already contains rather than on changing predicates.
What happens
- Every judgment must avoid self-contradiction, but a consistent judgment can still be false or lack grounds.
- The principle of contradiction establishes analytic truth because denying what a concept contains produces a contradiction.
- Synthetic judgments must obey this principle, but their truth requires grounds beyond it.
- The argument rejects adding a time condition to a purely logical principle.
- Examples involving age and ignorance distinguish changing predicates from predicates already contained in a subject concept.
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Quick check
Why does the argument reject a time condition in the principle of contradiction?
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