There's some tension between correctness and clarity. Both come in degrees, and writing in the top right quadrant is rare. But holding correctness fixed, I think OP (and Feynman) are right that they go together -- ie Corr(correctness, clarity | correctness) is very high.
(In the general case, though, you may be right. Corr(correctness, clarity) is often negative. But one is a bit more important than the other... simple sentences are a dime a dozen. It's the true ones we care about; only then does clarity enter.)
There's some tension between correctness and clarity. Both come in degrees, and writing in the top right quadrant is rare. But holding correctness fixed, I think OP (and Feynman) are right that they go together -- ie Corr(correctness, clarity | correctness) is very high.
(In the general case, though, you may be right. Corr(correctness, clarity) is often negative. But one is a bit more important than the other... simple sentences are a dime a dozen. It's the true ones we care about; only then does clarity enter.)