> So if I take a photo of a pretty sunset, release it under MIT license, you'd say it's "not open source" unless I give you the sun and the atmosphere themselve

> So if I take a photo of a pretty sunset, release it under MIT license, you'd say it's "not open source" unless I give you the sun and the atmosphere themselves? Open source as a concept doesn't really apply to quite a lot of things. Your MIT-licensed photograph is "not open source" in the same way that `{} * {}` is "not a number" (it technically isn't, but that's not quite what NaN is supposed to mean).