> Are they saying I can't trust what I read in the license files of a project? That's not quite what they're saying. They're asking what's stopping anyone from

> Are they saying I can't trust what I read in the license files of a project? That's not quite what they're saying. They're asking what's stopping anyone from claiming their project is "open source", but actually meaning something most people won't recognize as such -- for example, "my project is open source because its source code is public. But if you want to legally do anything with it other than look, you have to pay me." If there isn't a standardized definition, someone can claim the above, and all you could really argue is that their definition of "open source" is different from yours (and they'll probably ask "who made you the arbiter of what's open and what's not?"). Once there is a standardized definition, the position instead becomes "your definition doesn't meet the international standard", which is a much weightier argument. As for hubris -- in much the same way that even with an international definition for something like a kilogram, nothing stops you from creating your own, different measurement, and claiming you're selling stuff "by your own measure of kilogram" to whoever will buy it, there will never be anything stopping you from creating your own definition of "open source" and carefully defining it in a license file. It's just that if that definition differs from the standardized one, developers will either have to carefully read your license (or have their lawyers do that), or choose to use a project with a standard license that's already been vetted a thousand times over.