Theorem truthtbltorf-P4.38b 504

Description: ( T ∨ F ) ⇔ T. †

Assertion

Ref	Expression
truthtbltorf-P4.38b	⊢ ((⊤ ∨ ⊥) ↔ ⊤)

Proof of Theorem truthtbltorf-P4.38b

Step	Hyp	Ref	Expression
1		idorfalser-P4.20b 441	1 ⊢ ((⊤ ∨ ⊥) ↔ ⊤)

Syntax hints:   ↔ wff-bi 104   ∨ wff-or 144  ⊤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-or-D2.3 145  df-true-D2.4 155  df-false-D2.5 158

This theorem is referenced by: (None)