Decidable iff Recognizable and co-Recognizable Proof

[@ansharora3248]

The number of views clearly depicts how difficult the subject you are trying to teach is. Most people won't ever touch these. Kudos!

[@trdi]

Yeah... I think that channel is directed at a very narrow range of people and I'm probably not one of them.

[@irisfang5961]

GEM! So clear and concise!

[@SunShine-xc6dh]

Do the opposite is not part of h and is the part that breaks d. They aren't the same

[@Max-se9fb]

gemerald