Theorem pm2.07 916

Description: Theorem *2.07 of [WhiteheadRussell] p. 101. (Contributed by NM, 3-Jan-2005.)

Assertion

Ref	Expression
pm2.07	⊢ (𝜑 → (𝜑 ∨ 𝜑))

Proof of Theorem pm2.07

Step	Hyp	Ref	Expression
1		olc 882	1 ⊢ (𝜑 → (𝜑 ∨ 𝜑))

This proof depends on syntax axioms:   → wi 4   ∨ wo 861

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This proof depends on definitions:  df-bi 210  df-or 862

This theorem is used by:  oridm  918  exel  5402