> doesn’t make the wrong word the right one. Just that it’s a lazy combination and people don’t need to mind

That’s a fair interpretation. I’m going one step further: if most people use the term “wrong,” including experts and industry leaders, that’s eventually the correct use. The term “open source” as requiring open training data is impractical to the point of being virtually useless outside philosophical contexts. This debate is on the same plane as folks who like to argue tomatoes aren’t vegetables, when the truth is botanically they aren’t while culinarily they are. DeepSeek’s model not being open source is only true for the FOSS-jargony definition of open source—in non-jargon use, it’s open source.