Def  == Unit+Unit

is mentioned by

Thm* b:. (b ~ true)  (b ~ false)	[bool_cases_sqequal]
Thm* x,y:Atom. x=yAtom = false  x = y	[eq_atom_eq_false_elim]
Thm* x,y:Atom. x=yAtom = true  x = y	[eq_atom_eq_true_elim]
Thm* i,j:. (i<j) = false  i<j	[lt_int_eq_false_elim]
Thm* i,j:. (i<j) = true  i<j	[lt_int_eq_true_elim]
Thm* b:. b = false  (b ~ false)	[bool_sim_false]
Thm* b:. b = true  (b ~ true)	[bool_sim_true]
Thm* SQType()	[bool_sq]

In prior sections: bool 1

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