Avicenna is a strong proponent of what some of the later ones call qāʻidat al-wāḥid or ‘rule of the one’ (RO). The gist of RO states: from the one only one directly proceeds. In the secondary literature, discussion of this Avicennian rule is usually limited to a particular application of it i.e., the issue of emanation. As result, it’s not really clear what RO means, nor why Avicenna endorsed it. In this paper, I try and remedy this situation by doing (...) two things – one on the taṣawwur front, the other on the tasdīq. First, explain just what the terms of RO amount to – that is, its subject and predicate. In doing this, I distinguish between a narrow and a broad understanding of RO, and the show that, on the Avicennian view, the scope of RO is broad; it is meant to be a general principle of efficient causality. This is why it is appealed to in various contexts to establish substantial philosophical theses. Second, I consider an argument Avicenna offers for RO in the Mubāḥathāt. In unpacking it, I uncover some of its realist presuppositions, and then further clarify it in light of a critique first raised by Bahmanyār and then later made famous by Fakhr al-Dīn al-Rāzī. I then conclude by seeing whether the Avicennian has the resources within the initial premises of the argument to meet the objection that’s raised. (shrink)

God is omniscient; therefore, He knows that ‘the flower in my hand is red.’ If God knows that ‘the flower in my hand is red,’ then He knows it perceptually. God does not know anything perceptually. It is clear that the set of propositions – form an inconsistent triad. This is one of four problems with which Avicenna was engaged concerning God's knowledge of particulars, which I call the problem of perceptual knowledge. In order to solve PPK and three other (...) problems, Avicenna has developed a theory concerning God’s knowledge of particulars. Secondary literature around Avicenna’s theory of God’s knowledge of particulars has mostly directed its attention to give an account of Avicenna’s positive theory rather than the problems which that theory was designed to solve. But this paper will not do the same thing as this secondary literature. In contrast, in this paper, I will concentrate on the characterization of one of the problems, i.e., PPK, because of which Avicenna has presented his positive theory of God’s knowledge of particulars. In short, this paper aims to show why Avicenna deems explaining God’s knowledge of, say, the redness of a flower, via his accepted theory of perception as problematic. In this regard, I will extract three versions of PPK based on Avicenna's philosophy and through it will shed some light on Avicenna’s theory of God’s knowledge of particulars. (shrink)

(i) God is omniscient; therefore, for any change, C, among particulars, God knows the occurrence of C. (ii) If God knows the occurrence of C, then X. (iii) not-X. It is clear that the set of propositions (i)—(iii) is inconsistent. This is the general form of two problems—which I call the ‘problem of change in knowledge’ (PCK) and the ‘problem of change in essence’ (PCE)—for Avicenna concerning God’s knowledge of particulars. No work in the secondary literature has discussed exactly what (...) PCK and PCE are. In this paper, I will clarify exactly what they are. (shrink)

Islamic philosophy is a unique and fascinating form of thought, and particular interest lies in its classical period, when many of the ideas of Greek philosophy were used to explore the issues and theoretical problems which arise in trying to understand the Qur'an and Islamic practice. In this revised and expanded 2001 edition of his classic introductory work, Oliver Leaman examines the distinctive features of Classical Islamic philosophy and offers detailed accounts of major individual thinkers. In contrast to many previous (...) studies that have treated this subject as only of historical interest, he offers analysis of the key arguments within Islamic philosophy so that the reader can engage with them and assess their strengths and weaknesses. His book will interest a wide range of readers in philosophy, religious studies and Islamic studies. (shrink)