IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
cand functionality wrt iff a1,a2,b1,b2:Prop. (a1a2) (b1b2) (a1 & b1a2 & b2)
By:
Auto THEN ExRepD THEN ThinTrivial THEN Try Trivial
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
a1,a2,b1,b2:Prop. (a1 
a2) 
