First, eggplants and zucchini are fruits too, and both are sweet, just not banana-sweet (in fact, try zucchini bread if you haven't - best shit ever). Second, many veggies are sweet, like carrots, onions (though it's masked until cooked), and ...uh... sweet potatoes. Third, good tomatoes are absolutely sweet, not like candy but especially the little salad tomatoes aren't very far removed from a grape, which I think we agree are a fruit. Then there's olives, that bizarrely savory, dark fruit. They're delicious but I'm pretty sure they're from another planet.

So overall I think, if we're going to go by flavor, then imo acidity is the least ambiguous differentiator. Still not perfect, I'd rather just call it a fruit if it has seeds and isn't a pod. I'll give it to you on texture though

Peppers are fruit too

Yeah, thanks nature for not adequately distinguishing between fruits and vegetables by cooking techniques!

Sometimes, you can be such a cunt, nature.

I love playing around with recipes so have indeed made broc and carrot sauces, but this is kind of all about what feels right to say. And I think that there's a lot of cases where it feels wrong to describe tomato as a vegetable. Kind of how I'd feel odd calling lettuce a vegetable.

Okay but if someone offered me a pizza with broccoli or carrot sauce I'd have to politely, but firmly refuse

Oh yeah, I forgot about those. Funnily enough, here in Spain bananas are plátanos and plantains are bananas

mushrooms are not fruits in any sense. Fruiting body is applied colloquially however since spores are not fruits this is also incorrect.

However much like with calling a tomato a fruit, it's perfectly clear to call the penis loo lookin' thing a fruiting body and only derranged pedants are bothered by it.

Fruits are a specific part of the plant, the seed-bearing part (pods and ferns are the exceptions, I guess). Veggies are the rest of the plant. Mushrooms are fungi's and all, don't get me wrong, but they're not plants