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Theorem merco1lem6 1486
Description: Used to rederive the Tarski-Bernays-Wajsberg axioms from merco1 1478. (Contributed by Anthony Hart, 17-Sep-2011.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
merco1lem6

Proof of Theorem merco1lem6
StepHypRef Expression
1 merco1lem5 1485 . . . . 5
2 merco1lem3 1483 . . . . 5
31, 2ax-mp 5 . . . 4
4 merco1lem5 1485 . . . 4
53, 4ax-mp 5 . . 3
6 merco1lem3 1483 . . 3
75, 6ax-mp 5 . 2
8 merco1 1478 . 2
97, 8ax-mp 5 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wfal 1317
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 177  df-tru 1319  df-fal 1320
This theorem is referenced by:  merco1lem7  1487  merco1lem8  1489
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