First, I wish to appologize.
While I am actually fairly familiar with the GPL,
I am not intimate with either the various forms of BSD License or
the ISC.
Somehow jumping back and forth between them all on wikipedia before
my original
post I missed the clause that appears to be in each of them require
preserving the
License/Permissions as well as the copyright.
I made an honest effort to look, and somehow read right through
exactly what I was looking for.
I went back over the ISC a second time before posting, but I read
what I was expecting to see, not
exactly what was writing.
That fairly well obliterates the main point I was attempting to make.
But many of the other issues are still valid.
The argument that you start with copyright and then add or subtract
based on the license is
correct.
But you can not expect copyright law to return, rights you cede in
your license.
Yes, a License is a legal document, and MOST legal documents are
immutable,
but generalization is not the same as law.
The ISC and BSD Licenses are immutable, because although they cede
alot, they do preserve that.
They are not immutable, because all legal documents are inherently
immutable.
