(5steps total) PrintForm Definitions core StandardLIB Doc
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At: iff preserves decidability 1 2
1. A : Prop
2. B : Prop
3. A
4. A  B
  B  B
By: (DNth 2 0) THEN (Analyze 0)

Generated subgoal:

1 4. A  B
5. A  B
6. B
  False
1 step

About:
proporfalse
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

(5steps total) PrintForm Definitions core StandardLIB Doc