Theorem truthtblnegt-P4.35a 493

Description: ¬ T ⇔ F. †

Assertion

Ref	Expression
truthtblnegt-P4.35a	⊢ (¬ ⊤ ↔ ⊥)

Proof of Theorem truthtblnegt-P4.35a

Step	Hyp	Ref	Expression
1		dffalse-P3.49 365	. 2 ⊢ (⊥ ↔ ¬ ⊤)
2	1	bisym-P3.33b.RC 299	1 ⊢ (¬ ⊤ ↔ ⊥)

Syntax hints:  ¬ wff-neg 9   ↔ 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  df-false-D2.5 158  df-rcp-AND3 161

This theorem is referenced by: (None)