A photo of a horse, but the conversation is not about how to make photo of a horse. And about why a horse is called a cloven-hoof. Surprisingly, a person is inclined to invent his definitions and qualifications. Otherwise, how to understand all the diversity of our world. And what if the world is not at all like that? And perhaps the opposite. There will be a misunderstanding and confusion. The other day I heard a lecture about flights to Mars. The lecturer asked how you would explain to aliens or aliens, I do not understand the difference, our land. What do you call it? There were different cries with different names of our planet.
And what's the difference how to call our land. It generally has no relation to the object. The names of the object itself are not defined but simply described for our indications. For example, using 0 and 1, the computer describes the same object in its memory.
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From @le0nid