On Tue, 2003-10-14 at 04:45, Edmund GRIMLEY EVANS wrote: >You seem to be saying that A and C are DFSG-free, but B isn't. So >something released with license A is free, but software dual-licensed >with A and B is non-free. I seem to be seeing or imagining some kind >of paradox here ...
Given:
A := BSD to all
B := BSD to few, GPL rest
C := GPL to all
A => free
C => free
Now, "Dual licensed under A and B" means "A OR B", so we can conclude:
A OR B => free
C OR B => free
However, without further "givens", we can logically conclude *nothing*
about B.
I think the apparent paradox is coming from confusing "dual license" to
mean "AND" instead of "OR".
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