CUNNING, n. The faculty that distinguishes a weak animal or person from a strong one. It brings its possessor much mental satisfaction and great material adversity. An Italian proverb says: "The furrier gets the skins of more foxes than asses."
CARTESIAN, adj. Relating to Descartes, author of 'Cogito ergo sum' to demonstrate the reality of human existence. The dictum might be improved 'Cogito cogito ergo cogito sum' 'I think that I think, therefore I think that I am' as close an approach.