Def P  Q == P+Q

is mentioned by

Thm* True  P  True	[true_or]
Thm* P  False  P	[or_false]
Thm* False  P  P	[false_or]
Thm* P  True  True	[or_true]
Thm* p,q:. (p  q)  p & q	[not_or]
Thm* p,q:. (p & q)  p  q	[not_and]

In prior sections: core bool 1

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