Sixty years ago Tom Lehrer wrote a song about something much like this depiction of crypto.
Its concluding lyric was "So simple, so very simple, that even a child can do it!"
Mark D. Garfinkel, Ph.D.
“So we’re trading stickers we can’t see,” Sophie says.
“Yes,” Ms. Delgado answers.
“And we know we have them because of the list.”
“Yes.”
“And nobody is in charge of the list.”
“That’s correct.”
Liam raises his hand. “What if someone takes the stickers?”
At 9:03 a.m., Ms. Delgado makes the mistake of asking the class what their parents do for work. “Dentist,” says Maya. “Firefighter,” says Liam. “Bus driver,”...
