There is no substantiation provided in the article for this assertion. You are simply repeating an unsupported claim. What was the name of the book? What was the name of the blog post?

I think you’re trying to express skepticism about this claim, but the way that it’s phrased, if the claim were true, directly answering your questions would be to doxx the author of Slate Star Codex here in this thread.

Reach out to Vice and let us know when you have the answer.

If you could also get proof of SSC’s claim as well that’d be ideal.

You are making the unsubstantiated claim, it seems to me it has to be regarded as unproven until you can offer more details.

By taking down the blog and writing the open letter, Alexander has made it extremely clear what his current anonymity preferences are.

It must feel incredibly horrible to be asking for privacy, citing safety reasons, only to have people dig up deanonymizing opsec failures from the past and suggesting they somehow indicated you did not really intend or deserve to have privacy today.