THE subject of probability originated in the consideration of actual but trivial problems. Its obvious attractions as a field for the exercise of mathematical ingenuity soon gave it a predominantly ...

"Yes or no: was there once life on Mars?" I can't say. "What about intelligent life?"' That seems most unlikely, but again, I can't really say. The simple yes-or-no framework has no place for shadings ...

IN his article on The Meaning of Probability in NATURE of September 14, Dr. Dingle has attempted to support his case by means of a striking example. Unfortunately his illustration is by no means ...