is mentioned by

Thm* 'a:S, t:'a List, h:'a. cons(h; t) = nil  False	[not_cons_nil2]
Thm* 'a:S, t:'a List, h:'a. nil = cons(h; t)  False	[not_nil_cons2]

In prior sections: core bool 1 hol hol list 1

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