Theorem truthtblfimf-P4.36d 498

Description: ( F → F ) ⇔ T. †

Assertion

Ref	Expression
truthtblfimf-P4.36d	⊢ ((⊥ → ⊥) ↔ ⊤)

Proof of Theorem truthtblfimf-P4.36d

Step	Hyp	Ref	Expression
1		rcp-NDASM1of1 192	. 2 ⊢ (⊥ → ⊥)
2	1	thmeqtrue-P4.21a 442	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)