 “Conductive” arguments support their conclusions by accumulating non-decisive reasons in their favor. They are valid when they collective enough reasons to warrant their conclusions. In a particular case, different elements of evidence may suggest but not prove that someone charged with murder is guilty but make the conclusion likely if enough evidence of this sort is accumulated (a witness claims he pulled the trigger, the ballistics report shows that the bullet came from a gun he owned, he wrote an e-mail saying he would “get” the victim, etc.). 