Over at Philosophy15, Talisse and I have a short bit on why argument must not only have the core relation between premises and conclusions, but also must have a dialectical element to it.  A familiar point for those who are regular NS readers, but worth a  quick posting.

A consequent point is that it looks like the dialectical element to argument leads to a few skeptical problems for those who think that democracy must be deliberative.  (We follow up on that in the next episode.)