(<=> (Quoterm ?Expr)
(And (Term ?Expr)
(List ?Expr)
(= (First ?Expr) (Quote Quote))
(Expression (First (First ?Expr)))))
(Expression (First (First ?Expr))) (= (First ?Expr) (Quote Quote)) (List ?Expr) (Term ?Expr)
(Exhaustive-Subclass-Partition Term
(Setof Variable
Constant
Listterm
Setterm
Quoterm
Logterm
Quanterm))
(<=> (Quoterm ?Expr)
(And (Term ?Expr)
(List ?Expr)
(= (First ?Expr) (Quote Quote))
(Expression (First (First ?Expr)))))