There are lots of things people sit on that we would not categorize as chairs. For example if someone sits on the ground, Earth has not become a chair. Even if something's intended purpose is sitting, calling a car seat or a barstool a chair would be very unnatural. If someone were sitting on a desk, I would not say that it has ceased to be a desk nor that it is now a chair. At most I'd say a desk can be used in the same manner as a chair. Certainly I would not in general want an AI tasked with object recognition to label a desk as a chair. If your goal was to train an AI to identify places a human could sit, you'd presumably feed it different training data.
> Reddit post that says it makes sense to throw things on the floor
Floor as storage, floor as transport and floor as aesthetic space are three incompatible views of the same of object. The latter two being complementary usually outweighs the first, however.
And that comment reminded me of a New Zealand Sky TV advert that I haven't seen in decades, but still lives on as a meme between a number of friends. Thanks for that :)
