Yeah, I think that's wrong. Since they are discrete and not a continuum. Since there are only two extremes.
If his new relationships were true it would make the opposite idioms consistent with their non-opposite counterparts. Kind of the same concept as a contrapositive proposition, i.e. 'if A then B' implies 'if not A then not B'.
Yeah, I can buy that. My thought was that there is no spectrum here though. Just two points.