Answering part of a question Some questions have distinctly answerable parts (this one, for example). If I know the answer to one part but not the other, is it acceptable to answer in part? I'm assuming that no better answers have appeared yet.

The difficulty probably comes for the asker when choosing the "correct" answer if/once someone else has answered the other half of the question. I have no solution to that problem. Maybe some questions should be split in two.

Nonetheless, an answer to only part of a question is worthwhile for several different reasons.

1. It might jog someone's memory enough to figure out the other part.
2. It might be the only answer that is ever provided and _some_ information is better than no information.
3. It might be that the part you know the answer to is the _important_ part in the asker's mind, and the other part is just out of curiosity.