I am sorry I am slow in reading the commentary but I will eventually get there. As to the Stoic assent issue, it seems to me that either in DeWitt or one of the commentaries I've read in the past, an analogy is made (by someone, can't remember who) between the "assent" issue and the Epicurean discussion of "phantastic" impressions. I know that DeWitt has a section on this but I don't think that's the only place I have read this.
I seem to also recall that the parallels or similarities are wrapped up in something else that we've not discussed very much, that the Stoics were in a way "materialists" too (perhaps in relation to sensation that is what I am remembering). There's a lot of confusing discussion in the commentaries about thought processes and how the mind "grasps" things, but I don't have any impression as to where Aristotle was on grasping /assent.
