Editing Knowledge argument (section)

=== Epiphenomenalism ===
{{Main page|Epiphenomenalism}}

Jackson believed in the explanatory completeness of [[physiology]], that all behaviour is caused by physical forces of some kind. And the thought experiment seems to prove the existence of qualia, a non-physical part of the mind. Jackson argued that if both of these theses are true, then [[epiphenomenalism]] is true—the view that mental states are caused by physical states, but have no causal effects on the physical world.
{| cellpadding="10" style="margin:auto;"
|-
| style="width:25px;" |&nbsp;
| style="text-align:center;" |Explanatory completeness<br />of physiology
|&nbsp;+
| style="text-align:center;" |qualia<br />(Mary's room)
|=
|epiphenomenalism
|}

Thus, at the conception of the thought experiment, Jackson was an epiphenomenalist.