Thomas did register that. Dammit, he was used to making the opposite mistake in judgment. He stopped. "My apologies. You don't appear to be any sort of ghost I've heard of, and in the dimension I was born in, the other options would be dozens of intelligent cryptid species that try to look human but aren't. Or I've heard of revenants, but never had a chance to meet one."

Thomas isn't quite getting the idea of alternate Earths. Possibly because his own was so full of things that it is hard to find something that stands out as weird.