What's the difference between infralapsarian and postlapsarian?
Infralapsarian
Definition:
(n.) One of that class of Calvinists who consider the decree of election as contemplating the apostasy as past and the elect as being at the time of election in a fallen and guilty state; -- opposed to Supralapsarian. The former considered the election of grace as a remedy for an existing evil; the latter regarded the fall as a part of God's original purpose in regard to men.
(a.) Of or pertaining to the Infralapsarians, or to their doctrine.