Steven Pinker wrote a guest post titled 'NIPS vs. NeurIPS' on Scott Aaronson's blog Shtetl-Optimized.

True if a post titled 'NIPS vs. NeurIPS' (or close variant, e.g. with 'guest post by Steven Pinker') appeared on Scott Aaronson's blog Shtetl-Optimized and was written by Steven Pinker, published on or around 2019-12-23. Mostly true if Pinker wrote such a guest post on Shtetl-Optimized but the title or date differs slightly (e.g. a different wording or a date a few days off). Mixed if Pinker's text appeared on the blog but only quoted or excerpted by Aaronson rather than as a guest post, or the post was on a different blog by Aaronson. Mostly false if the post exists but was mainly written by someone else with only minor input from Pinker. False if the blog archive shows no such post, or shows it was written by someone else entirely.

Set before the research began.

1. E1 December 2019 – Shtetl-Optimized Shtetl-Optimized (Scott Aaronson's blog) · 28 December 2019

   “In the wake of two culture-war posts—the first on the term “quantum supremacy,” the second on the acronym “NIPS”—it’s clear”

2. E2 NIPS vs. NeurIPS: guest post by Steven Pinker Scott Aaronson's blog, Shtetl-Optimized (scottaaronson.blog) · 23 December 2019

   “today all of us here at Shtetl-Optimized are humbled to host a guest post by Steven Pinker: the Johnstone Professor of Psychology at Harvard University”

3. E3 NIPS vs. NeurIPS: guest post by Steven Pinker Scott Aaronson's blog, Shtetl-Optimized (scottaaronson.blog) · 23 December 2019

   “Steve’s guest post today consists of his response to this email.”

E4 and E5 come from the Shtetl-Optimized post titled "NIPS vs. NeurIPS: guest post by Steven Pinker," dated 2019-12-23. In it, Aaronson says the blog is hosting a guest post by Steven Pinker and that the post's body is Pinker's response to an email. E2, the blog's December 2019 archive, also refers to the post on the acronym "NIPS." The title, blog, author and date all match the criteria for true.