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Theorem stoic1aOLD 1650
 Description: Obsolete proof of stoic1a 1649 as of 20-May-2020. (Contributed by David A. Wheeler, 16-Feb-2019.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypothesis
Ref Expression
stoic1.1
Assertion
Ref Expression
stoic1aOLD

Proof of Theorem stoic1aOLD
StepHypRef Expression
1 stoic1.1 . . . . . 6
21con3i 140 . . . . 5
3 ianor 490 . . . . 5
42, 3sylib 199 . . . 4
54anim2i 571 . . 3
6 orcom 388 . . . 4
7 andi 875 . . . 4
8 pm3.24 890 . . . . 5
98biorfi 408 . . . 4
106, 7, 93bitr4i 280 . . 3
115, 10sylib 199 . 2
1211simprd 464 1
 Colors of variables: wff setvar class Syntax hints:   wn 3   wi 4   wo 369   wa 370 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8 This theorem depends on definitions:  df-bi 188  df-or 371  df-an 372 This theorem is referenced by: (None)
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