Yes, as a mathematical object, that is true. But any symbol we render in the physical world is going to be finite. Drawing a straight mark and calling it an in

Yes, as a mathematical object, that is true. But any symbol we render in the physical world is going to be finite. Drawing a straight mark and calling it an infinite set of points isn't really different from drawing a sideways 8 and calling it an infinite set. It's a symbol that represents something else.