Comment by jessriedel

I don't see any link between (1) communication and (2) my mind wandering away from my immediate surroundings and settling on an outstanding problem I have. My mind could (and occasionally does) wander over a million other things in my brain (e.g. past memories, imagining the future, or the feel of my clothes on my body) but predominantly focuses on outstanding problems, so I tend to think this is a highly purposeful adaptation.