 Our reason for believing in other minds is inference from behavioral effects to mental event causes. But epiphenomenalism denies such a causal connection. Therefore, epiphenomenalism implies the (exceedingly implausible) conclusion that we do not know that others have mental events. (Jackson, 1982, replies to this and several other arguments against epiphenomenalism. The argument is stated, and accepted, by Benecke, 1901.) 