Pure instinctive shooting means just looking at the target with total concentration, totally disregarding the arrow that's right there in your field ofvision,and directing your aim by feel. No sights, no conscious act ofaiming. It's supposedly allowing the subconscious brain to do all the yardage estimation, trajectory calculations, aimingand all that stuff automatically so all you have to do is stare at the spot you want to hit, draw and release. The practitioners of instinctive shootingliken it to throwing a baseball.
Ithinkthe term 'poke-n-hope' is a better way of describing it. Poke the bow out there and hope the arrow finds it's way to what you were hoping to hit.
My preference is for the gap aiming method advanced by Howard Hill and Byron Ferguson, using the tip of the arrow as an elevation reference. It's right there in the field of vision. You're seeing it anyway (though instinctive shooters swear they don't

). Might as well use it.