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.
Botany, n. The science of vegetables - those that are not good to eat, as well as those that are. It deals largely with their flowers, which are commonly badly designed, inartistic in color, and ill-smelling.
Learning -the kind of ignorance affected by (and affecting) civilized races, as distinguished from ignorance, the sort of learning incurred by savages. See nonsense.