Philosophy does not proceed by unsupported or unreasoned pronouncements. Nor does it proceed by any special kind of observation or experimentation not shared by the natural sciences. It proceeds by reasoning and argument. It asks after foundations and hunts down ultimate assumptions. It often challenges what everyone accepts and asks for proof when no one is in doubt.
Philosophy is inter-disciplinary.
It has something to interest the student of literature, mathematics, the social sciences, the life sciences, and physics and chemistry. Not only does philosophy provide an understanding of a wide range of matters but the matters dealt with are important and exciting. Many subject areas besides philosophy inculcate various general intellectual skills. But philosophy, unlike most such areas, deals professionally with logic, the use of language, and the assessment of evidence. As a result, philosophy is an especially valuable training ground for the intellect.