How to prove undecidability?

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  1. The Theory of Theories. You know what they say about theories: everybody’s got one. In fact, some people have a theory
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  2. L15: Proof by Diagonalization that ATM (Halting Problem) is Not Decidable :

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  3. In computability theory and computational complexity theory, an undecidable problem is a decision problem for which it is known to be impossible to construct a single
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  4. to prove to be true by demonstration, evidence, or testimony; confirm or substantiate; to test or check the accuracy or correctness of, as by investigation
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  5. In computability theory, the Church–Turing thesis (also known as the Turing–Church thesis, the Church–Turing conjecture, Church's thesis, Church's conjecture
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  6. COMP3004 - Computational Complexity. Note: Whilst every effort is made to keep the syllabus and assessment records correct, the precise details must be checked with
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  7. ASU CSE355: Ch 4 Vid 2, Examples - Determine if languages are Decidable, TR, and/or Undecidable :

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  8. CSC 333 HW10 - Decidability and Reducibility :

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  9. Proof That Computers Can't Do Everything (The Halting Problem) :

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  10. ASU CSE355: Course Review, Examples - Techniques for proving ETM undecidable :

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  11. Lecture 40/65: Reducibility: A Technique for Proving Undecidability :

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  12. L12: Universal Turing Machines; The Halting Problem is Recognizable but Not Decidable :

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  13. Undecidability Tangent (History of Undecidability Part 1) - Computerphile :

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  14. L17: Using Reductions to Prove Language Undecidable :

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  15. L18: More Complex Reductions :

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