b == if b
True else False fi
Thm* 
b:
. b 
Prop
Q == (P 
Q) & (P Q)
Thm* A,B:Prop. (A B) Prop
Q == Q P
Thm* A,B:Prop. (A B) Prop
to a Prop is normally invisible since it is pretty obvious when it is
needed.
| assert |
Def b == if b True else False fi
Thm* |
| iff |
Def P Q == (P Q) & (P Q)
Thm* |
| rev_implies |
Def P Q == Q P
Thm* |
About:
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