>Seems to me that fair use is irrelevant here. Fair use relates to copyright; it's what gives us the right to quote short portions of a book in a term paper, for example.
>
>The discussion here isn't about copyright. It's about licensing.

The discussion was running VFP under Linux.

Whether there is a license or not, one can apply fair use to the copyright materials (which includes software).

Fair use of "software" also includes reverse-engineering, which is also "prohibited" by MS in their license.