• If you're doing an experiment, you should report everything that you think might make it invalid - not only what you think is right about it; other causes that could possibly explain your results; and things you thought of that you've eliminated by some other experiment, and how they worked -to make sure the other fellow can tell they have been eliminated.

    Richard P. Feynman: If you're doing an experiment, you should report everything that you think might make it invalid - not only what you think is right about it; other causes that could possibly explain your results; and things you thought of that you've eliminated by some other experiment, and how they worked  -to make sure the other fellow can tell they have been eliminated.
    "Surely You're Joking, Mr. Feynman!: Adventures of a Curious Character". Book by Ralph Leighton and Richard R. Feynman, 1985.