Def b == if b false else true fi

is mentioned by

Def isrcv(l;a) == isnull(a)isrcv(kind(a))lnk(kind(a)) = l

[w-isrcvl]

In prior sections: bool 1 union mb event system 1

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