Read this excerpt from Through the Looking-Glass by Lewis Carroll.

Alice couldn't help laughing, as she said, “I don't want you to hire ME—and I don't care for jam.”

“It's very good jam,” said the Queen.

“Well, I don't want any TO-DAY, at any rate.”

“You couldn't have it if you DID want it,” the Queen said. “The rule is, jam to-morrow and jam yesterday—but never jam to-day.”

“It MUST come sometimes to ‘jam to-day,’” Alice objected.

“No, it can't,” said the Queen. “It's jam every OTHER day: to-day isn't any OTHER day, you know.”

“I don't understand you,” said Alice. “It's dreadfully confusing!”

Applying real-world logic to this excerpt means that

everyone gets to have jam every second day of the week.
some people get to have jam some of the time.
all people have jam every day they work for the queen.
no one ever gets to have any jam in the looking-glass world.