“I’m still not sure I can accept the whole concept of every world being a story.”
“Well… let me try to convince you with three statements. Statement one: No civilization will ever reach a literature level capable of producing a convincing story.”
“…Is that a puzzle? Because it’s obviously wrong.”
“Statement two. No civilization reaching aforementioned literature level will ever produce a convincing story. Whether it’s because all the good writers are occupied with other tasks, or because they consider it unethical to hold entities captive in fictional stories, is beside the point.”
“That one is also wrong.”
“That just leaves the third one. All entities within our general set of experiences are living in a fictional story.”
“But that doesn’t follow from the first two!”
“If it doesn’t, it means that either of the first two must be true, and you just said they aren’t. And to prevent your next argument… If the story is convincing, just how would you tell?”