Def pq == if p q else false fi

is mentioned by

Def mk_pair == x:'a. y:'b. a:'a. b:'b. (a = x)(b = y)

[hmk_pair]

In prior sections: bool 1 hol hol bool

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