"Yes, that is true," I respond to Him, "but there's more to it than that. When I was a child, my brain developed severe ADHD, and I couldn't maintain my concentration on any one topic for more than a few seconds. Yet, I still managed to recircuit my thought patterns, so that I could play back what somebody says when I wasn't paying attention. The key thing there, is how do you remember what somebody says if you're not paying attention in the first place. I was remembering and replaying background noises, such as people talking directly to me, which with ADHD, was in fact background noise. The downside, was that it made people think that I was paying attention and must be stupid if he takes that long to answer a question."