 Among Plutarch's works, several serve polemical purposes. He wrote a number of works against the Stoic and Epicurean philosophies.  Against the Stoics are mainly the works On the Self-contradictions of the Stoics (De stoicorum repugnantiis), On the Common Notions against the Stoics (De communibus notitiis), On the Cleverness of Animals (De sollertia animalium), and On Moral Virtue (De virtute morali). Plutarch's main works against the Epicureans are: That One Cannot Live Happily Following Epicurus (Non posse suaviter vivere secundum Epicurum), Against Colotes (Adversus Colotem), Is ‘Live Unnoticed’ Well Said? (An recte dictum sit latenter esse vivendum). All these works are marked by the use of a distinct polemical tone against assumed adversaries, and of recognizable polemical strategies. They are often captious and in many instances betray a less than fair engagement with the views being opposed (see Warren 2011, 290–293 and Kechagia 2011, 135–294 for a vindication of Plutarch's polemics in Against Colotes).