Gigot would have us believe the  If Starr rises, Clinton falls; but if Starr falls, Clinton doesn't rise.
Gigot does not try to convince us that if Starr goes up that Clinton goes down.  
mnli hypothesis: Gigot does not try to convince us that if Starr goes up that Clinton goes down.   premise: Gigot would have us believe the  If Starr rises, Clinton falls; but if Starr falls, Clinton doesn't rise.