Whether it is unlawful to form a judgment from suspicions?

❌ Objection 1 : It would seem that it is not unlawful to form a judgment from suspicions. For suspicion is seemingly an uncertain opinion about an evil, wherefore the Philosopher states (Ethic. vi, 3) that suspicion is about both the true and the false. Now it is impossible to have any but an uncertain opinion about contingent singulars. Since then human judgment is about human acts, which are about singular and contingent matters, it seems that no judgment would be lawful, if it were not lawful to judge from suspicions.

❌ Objection 2 : Further, a man does his neighbor an injury by judging him unlawfully. But an evil suspicion consists in nothing more than a man's opinion, and consequently does not seem to pertain to the injury of another man. Therefore judgment based on suspicion is not unlawful.

❌ Objection 3 : Further, if it is unlawful, it must needs be reducible to an injustice, since judgment is an act of justice, as stated above (Article [1]). Now an injustice is always a mortal sin according to its genus, as stated above (Question [59], Article [4]). Therefore a judgment based on suspicion would always be a mortal sin, if it were unlawful. But this is false, because "we cannot avoid suspicions," according to a gloss of Augustine (Tract. xc in Joan.) on 1 Cor. 4:5, "Judge not before the time." Therefore a judgment based on suspicion would seem not to be unlawful.