At a USENIX Windows NT conference , Microsoft was presenting their future directions for NT. One of their speakers said that they would release a UNIX integration package for NT that would contain the Korn Shell.
A delegate stood up and said that this was not the "real" Korn Shell and was not compatible
The presenter insisted that he was wrong and that Microsoft had indeed chosen a "real" Korn Shell. After a couple of exchanges, the delegate walked out.
Another delegate then stood up and said "you do know you've just been arguing with David Korn don't you?"