Using the term "open source" without any definition is useless. If we can't agree on a definition, it's impossible to know if we're actually talking about the same thing.
I want people to use the OSI definition in order to elevate debates. I'd prefer to skip past definitions to more substantial matters, like whether "open source" (per OSI) is useful. Is it somehow better than closed source code? Is it _ethically_ valuable? Is there some subset of the OSI definition that provides more value than the rest? These are interesting discussions worth having.
Endless debating the meaning of "open source" is a huge waste of time.
Given that OSI is the only body I know of with a clear definition, let's use theirs and move on to more substantial topics.