Def true == inl()

is mentioned by

Thm* even(0) = true	[even_zero]
Def even(n) == if n=0 then true else even(n-1) fi   (recursive)	[even]

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