Availability:built-in
asserta(+Term, 
-Reference)
assertz(+Term, 
-Reference)
[deprecated]assert(+Term, 
-Reference)Equivalent to asserta/1, assertz/1, assert/1, 
but in addition unifies
Reference with a handle to the asserted clauses. The handle 
can be used to access this clause with clause/3 
and erase/1.