If this were a tomato we were talking about, I would understand. A tomato fits some characteristics of both a vegetable and a fruit, and we tend to use it for either general purpose, so there’s some confusion.
But the watermelon? Yes, I did my research. Yes, I know that there are some claims like how it’s part of the cucumber family, and therefore, could be considered a vegetable… But come on.
Even if it were 100% vegetable, I would say the vast majority of people think of it as a fruit. Maybe the vast majority of people are completely wrong even, but when you name your state vegetable as being the watermelon, you’re the one who looks stupid… Ah well. We probably didn’t have that high hopes for you anyway, Oklahoma. ;)