Shared here was something of a listicle (brief 1 or 2 sentences) compiling 50 or so surprising observations of math or statistics. E.g., Simpson's paradox. I believe article was hosted on Substack.
found it, hn link <a href="https://news.ycombinator.com/item?id=28764416">https://news.ycombinator.com/item?id=28764416</a> and source URL <a href="https://axisofordinary.substack.com/p/the-most-counterintuitive-facts-in" rel="nofollow">https://axisofordinary.substack.com/p/the-most-counterintuit...</a>