Webster's Revised Unabridged Dictionary · 1913

Instinctive

Instinctive , adjective

[Compare French instinctif.]

Of or pertaining to instinct; derived from, or prompted by, instinct; of the nature of instinct; determined by natural impulse or propensity; acting or produced without reasoning, deliberation, instruction, or experience; spontaneous.
Instinctive motion. — Milton
Instinctive dread. — Cowper
With taste instinctive give Each grace appropriate. — Mason
Have we had instinctive intimations of the death of some absent friends? — Bp. Hall

The terms instinctive belief, instinctive judgment, instinctive cognition, are expressions not ill adapted to characterize a belief, judgment, or cognition, which, as the result of no anterior consciousness, is, like the products of animal instinct, the intelligent effect of (as far as we are concerned) an unknown cause.