Art with mutliple licenses listed

Art with mutliple licenses listed

withthelove's picture

 

ok, sorry, I know this must have been asked before, but couldn't find anything after searching the forums a bit, so going to ask:

what does it mean if artists lists two, three or more licenses for a work?

Is it really pick the one you like best?   Wouldn't the least restrictive license always trump the others?   Alternately, isn't the GPL written in such a way that releasing under another license is not possible?

Seeing alot of CC-BY and OGA-BY combos, but even saw a CC0 + GPL-2.0 pairing, and quite sure those are not compatible licenses.