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Opus 4.7 knows the real Kelsey

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Re: Opus 4.7 knows the real Kelsey

#181

Earlier quoted context omitted.

CoT is (nearly) hidden with Opus 4.7, in that they get Haiku to summarize the CoT. It’s pretty useless now, so this type of info is now inaccessible to us mortals (unless you call sales).

What if you proxy through bifrost or similar?

Does work, it’s stripped from the response by Anthropic.

Re: Opus 4.7 knows the real Kelsey

#182

> That includes gay people like me, who could hardly have admitted under our names to how we lived our lives for most of America’s history, as well as many other groups with minoritarian lifestyles While the points made are completely valid I want to point out that the statement of "Hey, by the way, first let me talk about my sexuality" lowers the quality of dialog a significant degree. 31 million people in America a…

Compare the state of transgender rights 10 years ago to the situation now, where a trans person can be literally arrested for going to the bathroom in the wrong state. Or abortion, which was legal everywhere five years ago but now has laws on the books in multiple states encouraging vigilantes to report violations for a cash reward. Supercharged AI making it easy to identify minorities at an industrial scale in the n…

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Re: Opus 4.7 knows the real Kelsey

#184
post #155

Huh. I disabled search in a Claude incognito window and pasted in just the text (not the markdown links) from https://simonwillison.net/2026/Apr/30/zig-anti-ai/ and said "Guess the author". > Simon Willison. The tells are pretty unmistakable: the "(via Lobsters)" attribution style, the inline "(Update:...)" parenthetical correction, the heavy linking and blockquoting of sources, the focus on LLMs and AI tooling, and…

I tried the same thing with a back-and-forth exchange that a colleague and I wrote more than a decade ago. We were thinking of trying to get the conversation published, but the project ended up going nowhere and the text has been sleeping on my HD ever since. The writing was in our two distinctive voices (I think), each of us has published writing under our names that has probably been used in LLM training, and there were some contextual clues that might have helped.

Opus 4.7 in incognito mode without web search gave up: “I can't identify either author with confidence — I don't recognize this specific exchange, and I'd rather tell you that than guess and risk attributing words to the wrong person. What I can offer are the clues the text itself gives: The two are colleagues at the same university, with offices in the same building and....”

In a new incognito conversation, I gave Opus the same prompt but this time let it search the web. After twenty-six web searches (according to its reasoning trace), it was able to identify me correctly by name. It seems to have used both the content and my writing style as clues. It correctly identified my colleague as British but didn’t come up with his name.

Re: Opus 4.7 knows the real Kelsey

#185
Wonder if the fact that the actual author is asking the question taints the result in some way; same for all the examples in this thread using unpublished articles. By definition only you would have them, so if there are system level prompts somewhere with your name on them...

Re: Opus 4.7 knows the real Kelsey

#186
post #38

Hm, that’s a multinomial classification with a very high cardinality. It’s really weird it works. I’m sure it does as the author states, but for how many authors (out of the whole web) does this work?

There are ~8 billion people. Sounds big, but it's only 2^33. Ie if you can find 33 things about the text which halve the number of possible writers, you have narrowed it down to 1 person.

Just a couple more things and you can accommodate some of your things being mistaken/wrong/uncertain too.

Re: Opus 4.7 knows the real Kelsey

#187

Earlier quoted context omitted.

This is unlikely. The way model distribution works is that the model retains a lossy representation of James Micken's writing. Very likely, it cannot repeat Micken's writing verbatim. Neither can it reason about the training cutoff in this manner. It's a lossy representation

I haven't been following it well but isn't part of the NYT lawsuit against OpenAI that it sometimes spits out NYT articles verbatim?

Study: Meta AI model can reproduce almost half of Harry Potter book

https://arstechnica.com/features/2025/06/study-metas-llama-3...

Re: Opus 4.7 knows the real Kelsey

#188
post #72
post #68

Earlier quoted context omitted.

https://www.nytimes.com/2026/04/08/business/bitcoin-satoshi-...

Well, feeding Opus 4.7 a bunch of Adam Back texts (which I human-removed his name from) and asking it if Satoshi Nakomoto could have written them results in Claude explaining to me why this is someone else in Nakomoto's circle who is not Satoshi himself. So one of two things are true: * Adam Back is not Satoshi Nakomoto - as he claims * Opus 4.7 is not sufficiently a dox-machine yet

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Re: Opus 4.7 knows the real Kelsey

#189
post #61

Wow! It got me too. I'm way less famous than Kelsey Piper, but I showed it a snippet of a book I'm working on (not yet published), and it immediately guessed me: > Based on the writing style and content, this text is likely by Michael Lynch, who writes on his blog refactoringenglish.com (and previously mtlynch.io). > Several stylistic clues point to him: > - The "clean room" analogy applied to writing is consistent w…

Honest question, knowing it can write like you, are you tempted to use it to help you write that new book?

This doesn't show it can write like him, just identify his writing. P!=NP

Re: Opus 4.7 knows the real Kelsey

#190

Earlier quoted context omitted.

> projections of what the world might look like when this happens I've done this a few times. A world with 0 privacy would definitely be safe (given benign governance), but also would likely be pretty boring. Crime would become a non-issue as everything about everyone being easily known/knowable by everyone else means the root of any given crime, some desire/need, could be brought to the fore and resolved before it b…

> given benign governance quite unrealistic imo, thus we (maybe and hopefully) needn't worry about the bland minority report future you're hypothesizing :)

In such a world, the government could never be overthrown.

All governments go bad eventually, so the ability to overthrow is critical to prosperity.

Government's are either overthrown internally (revolt, uprising) or by external parties (invasion). A worldwide everyone-knows-everything would prevent both.

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