Theorem ad3antrrr

Deduction adding three conjuncts to antecedent. (Contributed by NM, 28-Jul-2012.)

Hypothesis
ad2ant.1
\( \vdash \varphi \rightarrow \psi \)
Conclusion
\( \vdash \varphi \wedge \chi \wedge \theta \wedge \tau \rightarrow \psi \)
Proof
ad2ant.1
adantr _
ad2antrr _