Theorem simprl3

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

Conclusion

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

Proof

simp3

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