I have studied many tutorials/texts on this concept and they all seem to stop short of a complete explanation. This one nailed it for me. Thank you for your thoughtful treatment of Cantor's diagonalisation argument!

Thank you Sir!

thank you so much, this is better than paid lectures

Your the best thank you.

Thank you sir!

Oh my god, your explanations are perfect and you are perfect. I'm no gay but I wish you'd marry me.