It’s always tough to determine how much outside knowledge is fair for a puzzle. Is it fair game to have a puzzle that connects to a calendar? Roman numerals? Pi?
I tend to consider those kinds of things, the kinds of things that every single person who goes through a formal education system should have been exposed to, to be fair game. If I were designing an escape room, I wouldn’t do something like this, but for home puzzles, I can be a little more flexible.
This week’s puzzle requires a little bit of outside knowledge, but like the things I mentioned above, I expect most people, and all people who would try to solve a puzzle on the internet, to have been exposed to it. So with that, good luck!
1 e then 2 e’s switching off
While true, there is also something more specific going on here!