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At: nonfin eqv unb inf iff negnegelim 2 1 2

1. P:Prop. P  P
2. A : Type
3. Finite(A Unbounded(A)
4. Unbounded(A)
  Finite(A)


By: BackThru: Thm*  Unbounded(A Finite(A)


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universepropimpliesall
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