Gish has a PhD in biochemistry from UC Berkeley. It's not an Ivy League degree, but then most of the Ivys have inferior biochemistry departments. At any rate, name-calling isn't a logical debate technique, as someone with the handle "ThinkPlease" should know.
I submit to you an example of the half truths that Gish performs in this transcribed radio debate between Hugh Ross and Gish.
There's also the transcribed and annotated debate between Ken Saladin and Duane Gish here.
Now he's not as bad as Kent Hovind, but his debating tactics are quite questionable.