I am baffled by the idea that there can be a 100% chance of anything. “Taxes,” suggested a friend this morning. Okay, fine: death and taxes. But anything else? Even the fact of the sun rising, the earth continuing to spin, the sky being up and the ground being down, gravity, entropy, cereal …

Surely the scientists at weather.com are rounding up? I would be much more comfortable with a percentage that allowed for the element of sheer randomness and chaos in our lives — 99.8% even. Am I alone in this?