I had…come to an entirely erroneous conclusion which shows, my dear Watson, how dangerous it always is to reason from insufficient data.
Arthur Conan Doyle, 1859-1930
Before ordering a test, decide what you will do if it is (1) positive or (2) negative; if the answers are the same, don't do the test.
Archibald Leman Cochrane, 1972
At the end of a patient visit, review once more (1) the working diagnosis and (2) the proposed plan to deal with it. Then ask, 'Is there anything else?'. You will be amazed (and patients will be gratified) at how often a less obvious reason for the visit is revealed.
Christopher D. Stanton, 1999
Depression is not a Prozac® deficiency.
Christine Northrop in The Toronto Star, 2001