One of the most famous criticisms for Avicenna's criticizers is about his opinion for the general acceptance of ethical propositions. On the other hand, he emphasizes that they are intelligible. They say that if they are generally accepted by persons, so they will be relative and conventional. But based on the principle of peripatetic philosophy his opinion will be a self-contradiction. Some contemporary Muslim thinkers emphasis that general acceptance of them in his view has belonged to the logical status of them. And the intelligibility of them has belonged to the epistemological position of them. But in this essay, it will be shown that the epistemological situation of the ethical proposition has a necessary relation to the logical posit...