Without peeking, recite John 3:16.
You could, couldn’t you? If not word for word, then certainly you could convey the gist of it. It’s the summary par excellence and we know it well.
Maybe too well.
Imagine you’ve never clapped eyes on John 3:16. You don’t know what it says or what it means. You don’t know Jesus or Christianity. You’ve never cracked open a Bible. You don’t know any church’s dogma or your family’s religious traditions or what your friends believe.