The point is that may people will instinctually call mushrooms a vegetable

If we take that same example and add 4 categories and then add milk as another item I am still willing to bet the average person will put mushrooms as a vegetable and make the categories fruit vegetable dairy meat even though vegetables aren’t real and you could have a category of animal products.

Now if you only quiz the biology majors you might get a different result but in the U.S. only 38% of people are college educated and the most common major is business