necessarian

1810, Charles Buck, Materialists, entry in A Theological Dictionary, Volume 2, page 86, And the Necessarian asserts, that if, in any given state of mind, with respect both to dispositions and motives, two different determinations, or volitions, be possible, it can be on no other principle, than that one of them should come under the description of an effect without a cause; just as if the beam of a balance might incline either way, though loaded with equal weights.