Are half-developed thoughts Open Loops? Do I need to capture them?

A lot of work-in-progress bloat comes from thoughts flitting through my head. A thought flits through. It feels important enough to develop. I start writing. I capture the seed thought, but I don't fully develop it. Now it's an open task in my in-progress list. Maybe I could not write it down and not capture as in-progress. But then, won't it be an open loop taking up brain space? I must cultivate…