set "baseuri" "cic:/matita/tests/discriminate".
alias id "not" = "cic:/Coq/Init/Logic/not.con".
alias num (instance 0) = "natural number".
-alias symbol "eq" (instance 0) = "leibnitz's equality".
+alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
theorem stupid: