Find the best solutions to your problems with the help of IDNLearn.com's expert users. Ask your questions and receive detailed and reliable answers from our experienced and knowledgeable community members.

Let S₂ = {⟨M⟩ | M is a TM with input alphabet {0, 1} such that |L(M)| = 2}, so S₂ contains all encodings of Turing machines whose languages contain exactly two strings in {0, 1}. Is S₂ decidable? Is it recognizable? Is it corecognizable? Answer the questions, and prove your answer.