Whether imprudence is a special sin?

❌ Objection 1 : It would seem that imprudence is not a special sin. For whoever sins, acts against right reason, i.e. against prudence. But imprudence consists in acting against prudence, as stated above (Article [1]). Therefore imprudence is not a special sin.

❌ Objection 2 : Further, prudence is more akin to moral action than knowledge is. But ignorance which is opposed to knowledge, is reckoned one of the general causes of sin. Much more therefore should imprudence be reckoned among those causes.

❌ Objection 3 : Further, sin consists in the corruption of the circumstances of virtue, wherefore Dionysius says (Div. Nom. iv) that "evil results from each single defect." Now many things are requisite for prudence; for instance, reason, intelligence docility, and so on, as stated above (Questions [48],49). Therefore there are many species of imprudence, so that it is not a special sin.