Machan discusses philosophical skepticism, particularly with regard to observed reality.
Tibor Machan is professor emeritus of philosophy at Auburn University, the R.C. Hoiles Chair of Business Ethics and Free Enterprise at the Argyros School of Business & Economics at Chapman University, and an adjunct scholar at the Cato Institute.
In this short lecture from the 1995 World Libertarian Conference of the International Society for Individual Liberty in Athens, Greece, Machan (who is portraying Aristotle in the video) talks about skepticism in philosophy and the nature of philosophical thought in general. Machan contends that a common strain running through philosophy has been an expression of skepticism for observed reality and that postmodernist thought conveys a degree of separation between the perception of a thing and the thing itself.