The refutation of philosophy

In the Muqaddima, Ibn Khaldun devotes a chapter to refuting philosophy and showing the corruption of those who profess it. This is his own view, and the museum presents it as attributed to him. ²

He says that the followers of philosophy claimed that all existence, the sensible and what lies beyond it, has its essences and states known through speculative thought and rational syllogisms, and that the correction of creeds comes through reflection and not through hearing. ²

He notes that they devised a canon for distinguishing truth from falsehood, which they called logic. Their leader is Aristotle, whom they call the First Teacher. Among the best known in Islam who took up their doctrines were al-Farabi and Ibn Sina. ²

Ibn Khaldun holds that their view is corrupt in several respects. Their attribution of existing things to the First Intellect falls short of what lies beyond it. Their proofs are universal mental judgements, whereas external existing things are individuated by their matter, so there is no certainty that the mental conforms to the external. He holds that questions of natural philosophy do not matter for religion or livelihood. ²

What is not recorded here: the replies of the philosophers, and the academic view. It needs a further source.