Took you this long to figure that out, @wyatts95 was right.

Read a book about old New England cemeteries that said the same thing. They would place markers facing east for religious reasons, but the real spacing and materials just came down to what the local stonecutter had on hand that year. Sometimes the fancy symbols we see now were just the standard template the carver used for everyone. Sun and rain did the rest of the work making it look all meaningful and old.

Mason's marks are common on old foundation stones like that.

Remember getting stranded overnight in Atlanta once... a really kind gate agent saw me looking lost and brought me some snacks from the break room. He felt bad but said they didn't have any secret spots, just the hard floor near the baggage claim. It was a nice gesture that made the night a bit better, even if I still woke up with a sore back. Sometimes the people working there are just as stuck with the bad setup as we are. Makes you wish airports would add a few proper rest areas instead of just more charging stations.

But what if he was just really bad at math, not cheating? The whiteboard rule seems like it could make things feel way too serious.