effacious

If so, then we would expect that in spite of our mental illusions of causally effacious intentionality and "changing one's mind," these states are, in fact, causally ineffacious.

Around the Blogosphere (Israelite Origins, Egypt, and the Brain) James F. McGrath 2008

But here in Scwartz's data we have clear evidence of quite the opposite - states of intentionality directly altering brain chemistry at will, showing conscious states to be amply caually effacious.

Around the Blogosphere (Israelite Origins, Egypt, and the Brain) James F. McGrath 2008

Perhaps the nicest thing about it is you can do it alone, and is in fact most effacious when you keep yourself generally that way, as well.

oatcake Diary Entry oatcake 2006

He tried to resume his former easy, indifferent air, but it was an affectation now, for the rousing had been more effacious than he would confess.

Little Women 1921

He tried to resume his former easy, indifferent air, but it was an affectation now, for the rousing had been more effacious than he would confess.

Little Women Louisa May Alcott 1860

While true silver, and certain magical silvers will actually burn their flesh on contact, and weapons made of them are as effacious as few other things, mithril will, over time, give a bad rash.

theRPGSite 2009