http://faqs.ign.com/articles/432/432894p1.html
heres a good example..
when robo is forced to kill his former love brainwashed by mother brain

robo "chooses" to do the right thing
there is conflict of interests within robo's flow of thinking and at the end a "choice" for doing the right thing
that is undeniably an act of will

seriously though.. how is "love" going to not be an act of will by itself?