"Paradigm-case argument" is a form of argument against philosophical skepticism found in contemporary analytic philosophy. It counters doubt about whether any of some class of things exists by attempting to point out paradigm cases, clear and indisputable instances. A distinguishing feature of the argument is the contention that certain facts about language entail the existence of paradigm cases. This claim, however, has been disputed in recent years, and the future status of the argument depends upon whether it can be upheld.

The paradigm-case argument has been used against a wide range of skeptical positions. A typical example is doubt about our ability to perceive directly material objects. Such doubt can be raised by reflection upon the physiological and physical facts about perception. For example, since seeing involves the transmission of light waves to our eyes and these waves are what immediately affects our eyes, it may...