Nuprl - Proof: decidable vs unique nsub2 1 2

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At: decidable vs unique nsub2 1 2

1. P : Prop
2.

!i:

2. if i=

P else

P fi

Dec(P)

By:	Analyze-1 THEN Analyze-1

Generated subgoal:

1 2. i : 2
3. if i=0 P else P fi
Dec(P)
3 steps

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