"Not diseased, just - okay, I have a sister, but she was magically created including everybody's memories about her a few months ago, and the spell doesn't seem to spread world to world all by itself but it can piggyback on people, so it got the whole Jarvis network. I wished everyone in Sunshine nontransmitting - and I was anyway, I was immune to the original spell, my sister-memories are a deliberate fork-and-merge - and now here too, because I don't think everyone who fails to remember Soph wants to start doing it just from the wrong Sherlock or Tony walking into a Bellparty."