High Quality Content by WIKIPEDIA articles! The knowledge argument (also known as Mary`s room or Mary the super-scientist) is a philosophical thought experiment proposed by Frank Jackson in his article "Epiphenomenal Qualia" (1982) and extended in "What Mary Didn`t Know" (1986). The argument is intended to motivate what is often called the "Knowledge Argument" against physicalism — the view that the universe, including all that is mental, is entirely physical. The debate that emerged following its publication became the subject of an edited volume — There`s Something About Mary (2004) — which includes replies from such philosophers as Daniel Dennett, David Lewis, and Paul Churchland.