725. Criticism of the Argument in the Preceding Paragraph.--(a) The supposition on which the argument rests is false. It supposes that the interpretation of the legal axiom that “a doubtful law does not oblige,” should be drawn from the philosophical definition of the terms, whereas it should be drawn from the sense given it by other rules of law. Now, there are canonical rules which declare that in doubt one should follow that which has possession, or that which seems more probable. Hence, the axiom quoted by the Probabilists refers only to cases of negative doubt; the other two rules refer to cases of doubt in the wide sense, or to cases of opinion; otherwise, we should have to admit that these legal maxims are contradictory, one to the other. Thus, it appears that Probabilism is based on a principle formulated to solve difficulties of an entirely different kind from those which the system deals with. (b) The argumentation itself is fallacious. It takes for granted that an opinion is certainly and solidly probable, not only when it has no opposite or when its opposite is less probable, but also when its opposite is equally or more probable. This cannot be. Solid probability on the other side of a question must create doubt about an opinion held, and so make it at best uncertainly probable or probably probable; while greater likelihood or presumption on the other side must make one’s own opinion appear imprudent and unworthy of a rational being, and therefore not solidly probable. 726. The Probabilists answer: (a) The two principles with reference to doubtful law are understood and proved by Probabilism by an analysis of the notions of obligation and incertitude (see 285, 654), and hence they apply to every case that is restricted to the question of probable lawfulness or unlawfulness. The rules quoted against Probabilism--there are some that might also be quoted against Probabiliorism and Equiprobabilism--are opposed to it only in appearance, since they deal with matters that are outside its sphere (see 697). Thus, in civil cases when both ownership and possession are doubtful, the decision must be given for the more probable side, since the issue is not what is lawful, but what seems to be true. As to the principle of possession, it is not, as supposed, unfavorable, but favorable to Probabilism; since liberty, inasmuch as it is presupposed by obligation (for only those who have freedom can receive obligation), has priority and must be given the benefit of the doubt, whenever a strictly probable reason in its favor cannot be refuted.