I believe that was shown in 2011 (though as this follow-up states, there was a slight mistake that needed to be corrected). https://accodeing.com/blog/2015/css

I believe that was shown in 2011 (though as this follow-up states, there was a slight mistake that needed to be corrected). https://accodeing.com/blog/2015/css3-proven-to-be-turing-complete https://accodeing.com/blog/2015/css3-proven-to-be-turing-com...