**Description:** /\ -manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011)
(New usage is discouraged.)

Ref | Expression | ||
---|---|---|---|

Hypothesis | bnj708.1 | $${\u22a2}{\theta}\to {\tau}$$ | |

Assertion | bnj708 | $${\u22a2}\left({\phi}\wedge {\psi}\wedge {\chi}\wedge {\theta}\right)\to {\tau}$$ |

Step | Hyp | Ref | Expression |
---|---|---|---|

1 | bnj708.1 | $${\u22a2}{\theta}\to {\tau}$$ | |

2 | bnj645 | $${\u22a2}\left({\phi}\wedge {\psi}\wedge {\chi}\wedge {\theta}\right)\to {\theta}$$ | |

3 | 2 1 | syl | $${\u22a2}\left({\phi}\wedge {\psi}\wedge {\chi}\wedge {\theta}\right)\to {\tau}$$ |