Common sense is the collection of prejudices acquired by age eighteen.

Albert Einstein (1879 - 1955), (attributed)

Stupid is forever, ignorance can be fixed¹.

Don Wood

The last time anybody made a list of the top hundred character attributes of New Yorkers, common sense snuck in at number 79.

Douglas Adams (1952 - 2001), "Mostly Harmless"

Everybody gets so much information all day long that they lose their common sense.

Gertrude Stein (1874 - 1946)

[Common sense] is the best sense I know of.

Lord Chesterfield (1694 - 1773)

The freethinking of one age is the common sense of the next.

Matthew Arnold (1822 - 1888), 'God and the Bible,' 1875

Nowadays most people die of a sort of creeping common sense, and discover when it is too late that the only things one never regrets are one's mistakes.

Oscar Wilde (1854 - 1900), The Picture of Dorian Gray, 1891

Nothing astonishes men so much as common sense and plain dealing².

Ralph Waldo Emerson (1803 - 1882), 'Art,' 1841

If an idea's worth having once, it's worth having twice.

Tom Stoppard (1937 - )