Life would be infinitely happier if we could only be born at the age of eighty and gradually approach eighteen. – Mark Twain, quoted in Autobiography with Letters by William L. Phelps
In science, “fact” can only mean “confirmed to such a degree that it would be perverse to withhold provisional assent.” I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms. – Stephen J. Gould
