Learning How to Count (Avoiding The Fencepost Problem) | BetterExplained: "Counting isn’t easy. Suppose your boss wants you to work from 8am to 11am, and mop floors 8 to 11. Simple - it’s one floor per hour, right?
Nope! There are 4 floors to mop (8, 9, 10 and 11) but only 3 hours to work (8-9, 9-10, and 10-11).
Whoa — we count floors 8-11 and hours 8-11 differently? You bet. And somehow, if the boss said 'Mop floors 8 to 11 on April 8th to 11th' everything would be ok.
Today let’s unravel this counting mystery."
