A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant.

A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant.

理论只有对错之分。模型还有第三种可能性:它可能是正确的，但无关紧要。

-- Manfred Eigen 艾根