Most me focus on the problem on hand and push the rest out of site mentally. Until you throw it back up on the table, those things pushed of are still out of site. That doesn't mean those things off the table are not important, just not apart of the immediate problem. Especially with my way of approaching things, you can come up to me and ask me a question about something. From first response you would think that I have completely forgotten about what it was you were talking about. Once my mind brings it back up and processes it I can tell you things about it in ad-nausium detail. That's how most technical analytical minds work, store it out in the peripheral till you need it, then bring it up.
Do you need to tell him/remind him, yep, if it's important to you. In other words, unless you do, it will remain "unprocessed". IMHO
