Calc
FreshVar()
FreshVars()
Inductive()
Lemma()
NewType()
PTheorem()
Proof
QExists()
QForAll()
QImplies()
Struct()
Theorem()
axiom()
cond()
define()
prove()
search()
simp()
None_()
OptionSort()
Some()
get()
is_option()
Helper to create Option None_ values >>> None_(smt.IntSort()) None_
T (SortRef)
DatatypeRef