MyTurtleSwimsUpsideDown

Townsends has a video on flips. He might have used a historical word for it.

Your logic is correct, but you are off by 1.

0-1 is year 1
10-11 is year 11

ELI5 answer?

In the conventional calendar, there wasn’t a year zero and it wasn’t skipped. Zero is the moment in time that we use to begin counting time.

Think of an elementary school style number line: …-3_-2_-1_0_1_2_3… Each number is one year apart. This makes the numbers measure something like Age. If you are 3 years old, you can count 3 years between 0 and 3.

But a year is not an Age. It is the span of time between ages, and the years we name are actually the spaces between the numbers on the number line. So the first year (1 AD/CE) is the first space after zero (between 0 and 1), and the first negative year (1 BC/BCE) is the first space before the 0 (between -1 and 0).

Then there is the astronomical calendar, which does have a year zero. They get this by naming the year (the space on the number line) after the number to the right side of the space on the number line.

A bunch of posts are saying see a GP and/or Psychiatrist, and absolutely do that. But also make sure you have a working carbon monoxide detector in your home (you should have one anyway). This vaguely reminds me of that one Reddit post.

Should I continue to persist after I have cut this olive in twain, and one of the portions thereof in twain again, then I’ll live, I’ll have half an olive, and I’ll’ve halved half an olive.

Thats a mascot.
You reinvented the mascot my dudes.

I’m getting a similar vibe. Maybe a PBS/Edutainment production company whose logo popped up in the post credits?
Or the logo of some publishing company that showed up on their worksheets or handouts? A standardized test logo?