Nuprl - Proof: no prop iff its neg 1

IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: no prop iff its neg 1

1. P : Prop
2. P

False

By:	P Asserted

Generated subgoals:

1 P
3 steps

2 3. P
False
2 steps

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IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html