Def p  q == if p true else q fi

is mentioned by

Def deq-member(eq;x;L) == reduce(a,b. eqof(eq)(a,x)  b;false;L)

[deq-member]

In prior sections: bool 1 num thy 1

Try larger context: EventSystems IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html