Sigh, thanks for letting me know. Ok since this is the ~third time someone has said this, I'll try to figure out a convenient solution (I guess hosting images on github?). Just FYI a VPN should let you see imgur images.
Oh sorry that was a joke. (Though you could teach that in kindergarten.) When I was in undergrad I had the privilege of taking Laszlo Babai's combinatorics class. I don't recall exactly how he phrased it, but he would say things like "As everyone learns in kindergarten, the powerset of [n] has size 2^n.".
Yeah I use imgur, which I've heard is somehow blocked in the UK. The US should work. Maybe I'll try to figure out fallback images and double-host on github, if that's a thing.