Def exists_unique == p:'a. b_exists_unique('a;x.p(x))

is mentioned by

Thm* 'a:S. all(e:'a. exists_unique(fn:hone  'a. equal(fn(one_el),e)))

[hone_axiom_2]

In prior sections: hol bool

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