Module Builtin.Tag
Each tag describes an extension of FO logic
type t=|T_liainteger arith
|T_lrarational arith
|T_hohigher order
|T_live_cnflive_cnf
|T_ho_normhigher-order normalization
|T_dont_increase_depthdon't increase depth
|T_extextensionality
|T_indinduction
|T_datadatatypes
|T_distinctdistinct constants
|T_ac of ID.tAC symbol
|T_cannot_orphan