pm4.62dc - Intuitionistic Logic Explorer

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Theorem pm4.62dc 899

Description: Implication in terms of disjunction. Like Theorem *4.62 of [WhiteheadRussell] p. 120, but for a decidable antecedent. (Contributed by Jim Kingdon, 21-Apr-2018.)

**Assertion**
Ref	Expression
pm4.62dc	DECID $\/$

**Proof of Theorem pm4.62dc**
Step	Hyp	Ref	Expression
1		imordc 898	1 DECID $\/$

Colors of variables: wff set class

Syntax hints:

wn 3

wi 4

wb 105 $\/$ wo 709 DECID wdc 835

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710

This theorem depends on definitions: df-bi 117 df-dc 836

This theorem is referenced by: ianordc 900

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