Rule of Material Implication/Formulation 1/Reverse Implication/Proof 1

Theorem

 * $\neg p \lor q \vdash p \implies q$

Proof

 * align="right" | 9 ||
 * align="right" | 7
 * $q$
 * Law of Identity
 * 7
 * The truth of $q$ still holds
 * The truth of $q$ still holds