10. This inner core, even though it is biologically based and instinctoid, is weak rather than strong. It is easily overcome, suppressed or repressed. It may even be killed off permanently. Humans no longer have instincts in the animal sense powerful, unmistakable inner voices which tell them unequivocally what to do, when, where, how and with whom. All that we have left are instinct-remnants. And furthermore, these are weak, subtle and delicate, very easily drowned out by learning, by cultural expectations, by fear, by disapproval, etc. They are hard to know, rather than easy. Authentic selfhood can be defined in part as being able to hear these impulse-voices within oneself, i.e., to know what one really wants or does not want, what one is fit for and what one is not fit for, etc.