But you and your whole observed reality are being identified with an elementary tensor here. If the answer to the question “How many elementary tensors make up a nonelementary tensor?” is “undefined, there is no answer, it depends on definition”, then we have just proved that the world isn’t an elementary tensor, because the existence of “you and your whole observed reality” is not just a matter of definition.
But you and your whole observed reality are being identified with an elementary tensor here. If the answer to the question “How many elementary tensors make up a nonelementary tensor?” is “undefined, there is no answer, it depends on definition”, then we have just proved that the world isn’t an elementary tensor, because the existence of “you and your whole observed reality” is not just a matter of definition.