Def pq == if p q else false fi

is mentioned by

Def match(l;t;t') Def == (||snds(l;t)||||rcvs(l;t')||) Def == (||rcvs(l;t')||<||snds(l;t)||+||onlnk(l;m(source(l);t))||)	[w-match]
Def p = q == 1of(p) = 1of(q)(2of(p)=2of(q))	[w-eq-E]
Def isrcv(l;a) == isnull(a)isrcv(kind(a))lnk(kind(a)) = l	[w-isrcvl]

In prior sections: bool 1 mb list 1 mb list 2 mb event system 2

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