Question: A tough word. Let Sigma = { 0 , 1 } . Given a fixed word w 0 in Sigma , is the

A tough word. Let \Sigma ={0,1}. Given a fixed word w0 in \Sigma , is the language
{M | M is a TM with input alphabet \Sigma that accepts w0}
decidable or not? Or does it depend on w0?

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