Henri Poincare Quotes
A very small cause which escapes our notice determines a considerable effect that we cannot fail to see, and then we say that the effect is due to chance.
Poincaré, Henri. Science and Method. Translated by Francis Maitland, Thomas Nelson and Sons, 1914, p. 68.
Politicians and public administrators have been aware of unintended consequences for a long time.
Politicians, like many other people, often confuse correlation with causality as few have studied or understand the mathematics of probability.
Jules Henri Poincaré was a French mathematician, theoretical physicist, engineer, and philosopher of science. He is often described as a polymath, and in mathematics as "The Last Universalist", since he excelled in all fields of the discipline as it existed during his lifetime.