Basicality of Concepts and Its Critiques

The possibility or impossibility of acquaired knowledge has been discussed for a long time by philosophers. Some of them consider it impossible, some others see it possible, and others consider it possible in a certain type of human knowledge and impossible in an another type. In Islamic philosophy, this problem has been discussed under the title of evidentiality or acquaintance of concepts and assents. Al-Razi believed that acquaintance of concepts is impossible and offered two reasons for it. In this paper, the author first outlines the history of the problem and then accounts and analyzes his reasons and critiques of other logicians and philosophers.