“The true logic for this world is the calculus of Probabilities, which takes account of the magnitude of the probability which is, or ought to be, in a reasonable man's mind.”
— James Clerk MaxwellMaxwell's 1850 essay, as quoted in Campbell and Garnett, The Life of James Clerk Maxwell (1882); wording varies

Commentary

Maxwell argued that rational belief should match the strength of the evidence. This view foreshadowed his later use of statistical methods in the kinetic theory of gases.