Theorem 3imp31

The importation inference 3imp with commutation of the first and third conjuncts of the assertion relative to the hypothesis. (Contributed by Alan Sare, 11-Sep-2016.)

Hypothesis
3imp.1
\( \vdash \varphi \rightarrow \psi \rightarrow \chi \rightarrow \theta \)
Conclusion
\( \vdash \chi \wedge \psi \wedge \varphi \rightarrow \theta \)
Proof
3imp.1
com13 _
3imp _