tag:blogger.com,1999:blog-13449684.post-57539439674707749892007-10-15T18:09:00.000-04:002007-10-15T18:10:36.380-04:00example used by professor in my philosophy class:<br /><br />My sister will shave her head and join the space program, if the aliens land on her roof. Therefore, she will shave her head and join the space program, if the skies are clear Tuesday, since the aliens will land on the roof if the skies are clear Tuesday.'how about that' mel allenhttp://www.blogger.com/profile/09092472457503286291noreply@blogger.com