Rule of Simplification/Sequent Form/Formulation 2/Proof 1/Form 1

Theorem

 * $\vdash p \land q \implies p$

Proof

 * align="right" | 3 ||
 * align="right" |
 * $p \land q \implies p$
 * $\implies \mathcal I$
 * 1, 2
 * 1, 2