in this research, the viewpoint of mīzā mahdī iṣfahānī, as the founder of tafkīk school (separatism), concerning the most important epistemological issues like the quiddity of cognition (or episteme), types of cognition, truth, and justification of knowledge (ma‘rifa) are studied. given the fact that epistemology has not been regarded as an independent science in the muslim world, but the musli...