Calc
Inductive()
Lemma
NewType()
Proof
QExists()
QForAll()
Struct()
axiom()
cond()
define()
prove()
search()
simp()
Cons()
List()
Nil()
Unit()
list()
Helper to construct Nil values >>> Nil(smt.IntSort()) Nil
sort (SortRef)
DatatypeRef