That’s it! The shorter Rebecca he knew must be an elf! Realization dawned on his face as the oh-so-wrong conclusion hit him.
“Yes! But not a clone, just another you, in another world! She’s lots shorter than you, and has pointy ears! I like her a lot.”
“Another-”

“The universe is a big place, I guess. Though if she’s shorter than me, there might be something wrong. My height is rather short for this region.”
What a strange universe it was if there was a version of her with elf ears and really short.