Uncertainty

"Mmm... Caramel-licious," Alex said, biting into the chocolate.

Angie gave him a look.

"What? Real people talk like that."

"No they don't."

"Sure they do."

"How would you know? You've never met a real person."

"Yes I have."

"Who?"

"Well..." Alex's face scrunched up in thought. "The author who's writing this. He's real."

"Is he?"

"Isn't he?"

"No," the author said. "I'm afraid I'm not real either."

"Well," Alex said, "What about the person who's writing you? Isn't he real?"

"I think so," the author said.

"I'm afraid not," God said. "I'm a figment of your characters' imaginations."

"But if we're not real," said Angie, "and you created us... And you're not real, and we created you...."

And just then, they all disappeared in a puff of uncertainty.