A Non Posse ad Non Esse Sequitur Argumentum Necessarie Negative, Licet Non Affirmative

asas a non posse ad non esse sequitur argumentum necessarie negative, licet non affirmative merupakan asas yang unik. Dalam Black Law Dictionary Fourth Edition asas ini memiliki definisi 'From impossibility to non-existence the inference follows necessarily in the negative, though not in the affirmative---is as ambiguous as the original. It could be translated thus: The negative inference of non-existence necessarily follows from impossibility of existence, but the affirmative inference of existence cannot be drawn from mere possibility.'