platitude
n. All that remains of a departed truth.
n. A moral without a fable.
n. A fossil sentiment in artificial rock.
n. The fundamental element of popular literature.
n. An idea that (a) is admitted to be true by everyone, and (b) that is not true.
n. A thought that snores in words that smoke.
n. A jellyfish withering on the shore of the sea of thought.
n. The wisdom of a million fools in the diction of a dullard.