--...compatibility is defined as a license that does not "impose any
further restrictions". Yes the GPL is compatible with itself in this sense,
but it is also compatible with any less restrictive license. (Dewar)

--Hmmm... So a license slightly more restrictive than GPL may be
compatible with GPL.
 
--No, that's false (perhaps there is a language problem, but the
sentence you quote from me is quite incompatible with your conclusion).
(Dewar)

--You are probably right. What I meant is an _open_source_ license (e.g.
AdĒlib's) slightly more restrictive than GPL may be compatible with GPL. 
Thanks.

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