Quote Origin: Deep Truths Are Statements in Which the Opposite Also Contains Deep Truth

Niels Bohr? Hans Bohr? Werner Heisenberg? Oscar Wilde? Emilio Segrè? Carl Sagan? Anonymous? Question for Quote Investigator: A famous scientist once asserted something like this: The opposite of a deep truth is another deep truth. Would you please help me to find a citation and the correct phrasing? Reply from Quote Investigator: In 1949 the …