--

definition id2 (A : Type*) (a : A) := a

#check id2 Type* num

#check id2 Type* num


#check id2 Type num

#check id2 _ num

#check id2 (Sort (_+1)) num

#check id2 (Sort (0+1)) num

#check id2 Type* (Type 1)

#check id2 (Type*) (Type 1)