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At: auto2 lemma 6 1 1 1 1 1 1 1 1

1. T: Type
2. R: TProp
3. f:(0T). Bij(0; T; f)
4. t:T. Dec(R(t))

Dec(t:T. R(t))

By: Unfold `decidable` 0

Generated subgoal:

1 (t:T. R(t)) (t:T. R(t))


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existsapplyuniversefunctionpropnatural_numberallor