The story’s point requires identifying the psychological state state that scissor statements put you into, where you feel reality is actually bending against you (eg “he turned her against me”).
If you think there is an explicit scissor statement Alexander could have committed to, then I think you might not appreciate the core thesis.
SSC's point is not "X is a near-universal scissor", it's that there's a scissor or ten for almost everyone, and that some scissors are likely to ensnare a lot of people.
If you've never found yourself arguing vehemently and extensively, to the death, about something and sometime later wondered what that was about, you may be a counterexample, someone who is scissor-immune.
I sure am not.
But I'm arguing (SSC may not be) that effective scissor statements create both passion and tunnel vision in people, even one at a time. And so when there are people with passion and tunnel vision on both sides, voilà, scissor. (It's a little bit like "drunken mob". You can't have a mob with just one person, but each person, arguably, gets drunk on their own.)
If you don't find the AI Box thing convicting, you won't be able to suspend disbelief for a fictional story about a sequence of words that can make you hate your friends and family.
Consider this quote: “Books are mirrors. You only see in them what you already have inside of you.” -Carlos Zafon. This isn't the quote I was actually searching for but I think gets the sentiment across: a blank mirror lets you see yourself much more clearly than the Mona Lisa.
This type of rhetorical device is constantly used by politicians. Donald Trump frequently says things like "you know what they're saying about..." without ever actually saying what is being said. Then the audience fills in the blank with their preconceived notions and boom: what he said is right in _all_ of their minds.
It is also unclear to me how one could find a true scissor statement and know it until one unleashed it and saw the effects. It would just seem obviously true or obviously false.