 Mulla Sadra inherited a variety of theories ranging from Platonic recollection (anamnesis) and division to Peripatetic syllogistics, definitions and axiomatic science. Broadly speaking, our author recognises three different epistemological methods. The first is a co-relational model of knowledge (Mulla Sadra 2001-5, III: 317). In this model, knowledge is a relation between a subject and an object that is devoid of cognitive content in itself and is not intrinsically intelligible. It is a property of the knower and devoid of actual process. Knowledge is dispositional. As such, this theory is marked by radical internalism. This is a view associated with later mediaeval theologians (especially Fakhr al-Din Razi) and rejected. It is unacceptable to Mulla Sadra precisely because it is predicated upon a denial of mental being. According to this model, knowledge is negative insofar as it is solipsistic (Mulla Sadra 2001–5, III: 318).