>> Two outcomes being "extremely possible"

What on earth is a professional like Silver doing using the word "extremely" in that context?

If I'd have written that kind of statement in school, the teacher would have crossed it out in red pen and told me to rephrase.

If I toss a coin, are the outcomes "heads" and "tails" both supposed to be "extremely possible", with "landing on its edge" being merely "unlikely"?

(In case you can't already tell) I'm with Taleb on this one.