Stultify: “to cause to appear or be stupid, foolish, or absurdly illogical.” http://www.merriam-webster.com/dictionary/stultify
Epiphenomenalism is the philosophical thesis that the mind (or mental phenomena such as beliefs or desires) exists (exist) but is (are) causally inefficacious:
http://plato.stanford.edu/entries/epiphenomenalism/
In order to have knowledge that one has a mind (or beliefs or desires), that mind (or beliefs or desires) must somehow be able to produce an effect on one’s brain. But in order to produce an effect on one’s brain, one’s mind (beliefs or desires) must somehow be causally efficacious, therefore refuting the thesis of epiphenomenalism.
Thus the SEP article notes:
http://plato.stanford.edu/entries/epiphenomenalism/#SelStu
The denial of free will--or the denial of having the ability to act volitionally, purposefully, intentionally--is self-stultifying in essentially the same way, and for similar reasons: the assertion that one lacks free will, if true, means that the assertion lacks truth-value (i.e., is meaningless), because the entity that lacks free will is unable to choose between a true statement and false statement.
QED
Epiphenomenalism is the philosophical thesis that the mind (or mental phenomena such as beliefs or desires) exists (exist) but is (are) causally inefficacious:
Epiphenomenalism is the view that mental events are caused by physical events in the brain, but have no effects upon any physical events.
http://plato.stanford.edu/entries/epiphenomenalism/
In order to have knowledge that one has a mind (or beliefs or desires), that mind (or beliefs or desires) must somehow be able to produce an effect on one’s brain. But in order to produce an effect on one’s brain, one’s mind (beliefs or desires) must somehow be causally efficacious, therefore refuting the thesis of epiphenomenalism.
Thus the SEP article notes:
2.4 Self-stultification
The most powerful reason for rejecting epiphenomenalism is the view that it is incompatible with knowledge of our own minds -- and thus, incompatible with knowing that epiphenomenalism is true.
The most powerful reason for rejecting epiphenomenalism is the view that it is incompatible with knowledge of our own minds -- and thus, incompatible with knowing that epiphenomenalism is true.
http://plato.stanford.edu/entries/epiphenomenalism/#SelStu
The denial of free will--or the denial of having the ability to act volitionally, purposefully, intentionally--is self-stultifying in essentially the same way, and for similar reasons: the assertion that one lacks free will, if true, means that the assertion lacks truth-value (i.e., is meaningless), because the entity that lacks free will is unable to choose between a true statement and false statement.
QED