GPL and NDA

[dewar at gnat.com]

<<Or the person that used the copy that had no license can license it using
the GPL: the original authors can not stop that.
>>

What do you mean by "had no license", are you talking about whether there
was a license notice on the source? If so, this is entirely irrelevant. There
is no binding legal significance to copyright and licensing notices that
appear as part of the document. They are useful information in tracking
down and verifying the exact copyright and license status, which is why
it is good practice to put them in, but it is not necessary to have suchg
a notice for the copyright to be valid, and licensing conditions are also
not required to be placed into the product itself.