Definitions bool 1 Sections StandardLIB Doc
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Some definitions of interest.
bandDef pq == if p q else false fi
Thm* p,q:. (pq 
bnotDef b == if b false else true fi
Thm* b:b  
borDef p  q == if p true else q fi
Thm* p,q:. (p  q 

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boolbfalsebtrueifthenelsememberall!abstraction
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions bool 1 Sections StandardLIB Doc