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Syntax Definition wvd2 28606
Description: Syntax for a 2-hypothesis virtual deduction. (New usage is discouraged.)
Hypotheses
Ref Expression
wph  wff  ph
wps  wff  ps
wch  wff  ch
Assertion
Ref Expression
wvd2  wff  (. ph ,. ps  ->.  ch ).

See definition df-vd2 28607 for more information.

Colors of variables: wff set class
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