From Umberto Eco’s On the Shoulders of Giants – in his lecture on The Abstract and the Relative
A specular theory of truth is adaequatio rei et intellectus (the equation of the intellect and the thing), as if our mind were a mirror that, when working properly and not a distorting one or misted over, must faithfully reflect things as they are. This is the theory put forward by Thomas Aquinas, for example, but also by Lenin in his Materialism and Empirio-Criticism (1909). And since Aquinas could not have been a Leninist, it follows that when it came to philosophy, Lenin was a Neo-Thomist.
Extracts 