Def p  q == if p true else q fi

is mentioned by

Def recognizer1(loc;T;A;P;k;i;r;x) Def == if loc = i Def == if [r :  initially r = false;  Def == if [only members of [k] affect r :;  Def == if [ma-single-effect1(r;;x;A;k;T;r,x,v. P(x,v)  r)] Def == else nil fi

[recognizer1]

In prior sections: bool 1 num thy 1 mb event system 2

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