Q:

Copyright issues

What should be done if a question uses copyrighted material?
E.g. this question seems to use the diagram due to Immermann.

A:

This case would obviously qualify as fair use, even if the image were uploaded to this site.
If you are at all bothered, click on "flag" under the question and select "Requires Moderator Attention".  Say that it looks like fair use, but that you are not completely sure.

