It’s all a social construct. It exists because and as long as we all agree on it. So it’s flexible and not set in stone, nor scientifically falsifiable
And the concept of a vegetable varies culturally. I live in Germany and I consider mais vegetables (it feels weird to call it corn in this context since other grains aren’t). In Romania (and elsewhere I guess) potatoes are a vegetable which they aren’t for me.
… before the turkic arrived so it was ethnically and culturally closer to Greece than to Turkey. Then again, he was an (ethnic) Jew. This was before nation states and the concept of race (and racism). I’m not going to die on any hill here, I could argue for many things.