The problem wasn’t the grade. It was a good grade. It was an A minus, and Mr. K didn’t give out a lot of those. The problem was—what was the problem? She read the paper again, and though it read all right, she didn’t recognize everything in it. But she’d been writing fast. The thing she snagged on was the same thing Mr. K snagged on: she’d gotten a date wrong.

See, the utopian community she was writing about had run afoul of a change in federal statutory rape laws—creepy, creepy—that took place in 1878. She knew that. Whereas the paper said 1881, which Mr. K would never have caught—though come to think of it he was a pretty creepy character himself, and she wouldn’t be surprised if he knew his way around a statutory rape law or two—except Wikipedia made the same mistake, and Mr. K loved to do spot-checking to catch people relying on Wikipedia. He’d checked the date, and checked Wikipedia, and put a big red X in the margin of Julia’s paper. And a minus after her A. He was surprised at her. He really was.

Julia was surprised too. She never used Wikipedia, partly because she knew Mr. K checked, but mostly because unlike a lot of her fellow students she cared about getting her facts right. She went back through the paper and checked it thoroughly. She found a second mistake, and a third. No more, but that was enough. She started checking versions of the paper, because she always saved and backed up separate drafts as she went, because Track Changes in Word was bullshit, and she wanted to know at what point exactly the errors got in. But the really weird thing was there that were no other versions. There was only the final draft.

This fact, although it was a minor fact, with multiple plausible explanations, proved to be the big red button that activated the ejector seat that blew Julia out of the cozy cockpit of her life.

She sat on her bed and stared at the file, which showed a time of creation that she remembered as having been during dinner, and she felt fear. Because the more she thought about it the more it seemed like she had two sets of memories for that afternoon, not just one. One of them was almost too plausible. It had the feel of a scene from a novel written by an earnest realist who was more concerned with presenting an amalgamation of naturalistic details that fit together plausibly than with telling a story that wouldn’t bore the fuck out of the reader. It felt like a cover story. That was the one where she went to the library and met James and had dinner and wrote the paper.

But the other one was batshit insane. In the other one she’d gone to the library and done a simple search on one of the cheapo library workstations on the blond-wood tables by the circulation desk. The search had yielded a call number. The call number was odd—it put the book in the subbasement stacks. Julia was pretty sure the library didn’t have any subbasement stacks, because it didn’t have a subbasement.