Sherlock side-eyed the note, the code, but doesn't say anything, turning his eyes back to Topher again when he speaks.

"... More usual than you'd think," Sherlock said, bluntly. "Though the fuzziness doesn't seem connected to length of time spent away. You aren't the first who's claimed that some memories return while others do not. I'm merely curious as to why that seems to be a part of the process, when being revived after an exceptionally long time, since it isn't always a factor. Sometimes they return with all memories completely intact."