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Theorem cbv3OLD 1985
Description: Obsolete proof of cbv3 1978 as of 22-Apr-2018. (Contributed by NM, 5-Aug-1993.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
cbv3OLD.1
cbv3OLD.2
cbv3OLD.3
Assertion
Ref Expression
cbv3OLD

Proof of Theorem cbv3OLD
StepHypRef Expression
1 cbv3OLD.1 . . . 4
21a1i 11 . . 3
3 cbv3OLD.2 . . . 4
43a1i 11 . . 3
5 cbv3OLD.3 . . . 4
65a1i 11 . . 3
72, 4, 6cbv1OLD 1983 . 2
8 tru 1340 . . 3
98ax-gen 1570 . 2
107, 9mpg 1572 1
Colors of variables: wff set class
Syntax hints:  ->wi 4   wtru 1335  A.wal 1564  F/wnf 1568
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1570  ax-4 1581  ax-5 1644  ax-6 1685  ax-7 1705  ax-10 1751  ax-11 1756  ax-12 1768  ax-13 1955
This theorem depends on definitions:  df-bi 179  df-an 362  df-tru 1338  df-ex 1566  df-nf 1569
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