You have merely copied Sipser
http://www.liarparadox.org/Sipser_165_167.pdf
D(⟨M⟩) = {accept if M does not accept ⟨M⟩
{reject if M accepts ⟨M⟩
Sipser has merely copied the Liar Paradox.
The Liar Paradox is merely erroneous because it is self-contradictory
Thus the whole concept of undecidability that is based on pathological
self-reference(Olcott 2004) is merely a misconception and nothing more.
It is just like asking:
What is the length of you car in colors of the rainbow?
The issue is not that people cannot make up their mind (decide) about
the correct answer the issue is that the question is incorrect.
This issue has snuck past human comprehension because we tolerate
terms-of the-art being assigned meanings that are incompatible with
their common meanings.
When we allow the term-of-the-art meaning to be assigned to the common
word "decidable" people are fooled. If we assign this same meaning
accurately people would not be fooled.
The correct name for undecidable decision problems that are based on the
pathological self-reference error is not "undecidable" the accurate name
for them is {erroneous}.
To eliminate these problems all knowledge must be organized as an
inheritance hierarchy that disallows overriding existing meanings.
If we did it this way then Russell's paradox would have never come into
existence. People would know that no physical or conceptual object can
ever possibly totally contain itself. A set as a member of itself would
then be immediately understood as incoherent.
> Note: I would like to acknowledge Olcott tirelessly refuted various wrong
> conventional HP proofs over these years for me. So I need not to do the
> same work again, though not necessary.
>
> --
> Copyright 2021 WIJ
> "If I can see further it is by standing on top of the tower of dwarfs."
>
--
Copyright 2021 Pete Olcott
"Great spirits have always encountered violent opposition from mediocre
minds." Einstein