Edited sentence: Despite the serious problems with it, Sino-Tibetan continues to be very strongly supported by its proponents, and accordingly it is widely accepted without question by non-specialists.Since both proponents and opponents of the hypothesis agree that it is not as well demonstrated as that of the Indo-European family, and in fact a convincing reconstruction of Proto-Sino-Tibetan has never been proposed, it remains to be shown that Sino-Tibetan is a valid family.The genetic relationship of the hypothetical Sino-Tibetan family thus remains disputed