Theorem truthtbltimf-P4.36b 496

Description: ( T → F ) ⇔ F. †

Assertion

Ref	Expression
truthtbltimf-P4.36b	⊢ ((⊤ → ⊥) ↔ ⊥)

Proof of Theorem truthtbltimf-P4.36b

Step	Hyp	Ref	Expression
1		trueie-P4.22a 444	1 ⊢ ((⊤ → ⊥) ↔ ⊥)

Syntax hints:   → wff-imp 10   ↔ wff-bi 104  ⊤wff-true 153  ⊥wff-false 157

This theorem was proved from axioms:  ax-L1 11  ax-L2 12  ax-L3 13  ax-MP 14

This theorem depends on definitions:  df-bi-D2.1 107  df-and-D2.2 133  df-true-D2.4 155

This theorem is referenced by: (None)