From wikipedia: "Instinct is the inherent disposition of a living organism toward a particular behavior. Instincts are generally inherited patterns of responses or reactions to certain kinds of stimuli."

I don't think you want to follow this in running your startup. I would rather recommend Intuition, or following a higher, above-rational understanding, rather than your animal reflexes. Intuition is most effective when not clouded by emotions, hence by becoming emotionally detached you can better use Intuition.