Theorem simpl3l

Simplification of conjunction. (Contributed by NM, 9-Mar-2012.) (Proof shortened by Wolf Lammen, 23-Jun-2022.)

Conclusion

\( \vdash (\chi \wedge \theta \wedge \varphi \wedge \psi) \wedge \tau \rightarrow \varphi \)

Proof

simpll

3ad2antl3 _