[Question] Another case of “common sense” not being common?

Okay, that is prob­a­bly not that good a char­ac­ter­i­za­tion. How­ever, I do like when some­one figures out a sim­ple way of look­ing at prob­lems that have gone un­solved and so thought to be very difficult, so there­fore must be re­ally com­pli­cated.

If you didn’t see this:

https://​​www.quan­ta­m­agaz­ine.org/​​math­e­mat­i­cian-solves-com­puter-sci­ence-con­jec­ture-in-two-pages-20190725/​​

No answers.