Metamath Proof Explorer


Theorem animorl

Description: Conjunction implies disjunction with one common formula (1/4). (Contributed by BJ, 4-Oct-2019)

Ref Expression
Assertion animorl φ ψ φ χ

Proof

Step Hyp Ref Expression
1 simpl φ ψ φ
2 1 orcd φ ψ φ χ