I think it's a pretty minor distinction. Rice and wild rice are both seeds from grain plants. If it's a grain seed that looks like rice, tastes similar to rice, and you use it like rice, I'm not sure it's more meaningful than being a good trivia question. Of course we eat other grains that aren't rice but they don't look like rice.

If you really want your mind blown, start a list of all the "vegetables" that are really fruits. We all know things like tomatoes are technically a fruit, so I know I'm not revealing some secret truth here. But a fruit is basically any kind of seed pod. Anything with seeds inside it is a fruit -- peppers, tomatoes, avocados, etc. The list gets long pretty quickly. I tried it once and realized that not only is guacamole basically a fruit salad, but I have too many fruits and not enough vegetables in my diet .