Rationalists choose to remove from the Bible’s teaching elements they find unacceptable (i.e. the miraculous, angels, Adam, virgin birth). Fundamentalists uphold the Bible’s claim to:- the Trinity, Christ’s unique deity, virgin birth, atoning sacrifice, physical resurrection and promised return. Fundamental doctrines that don’t require explanation, as faith can proceed without understanding although as Anselm said there’s nothing wrong with faith seeking understanding. That’s theology – the study of God.