From Newsgroup: rec.puzzles
(i think i already said... I knew Smullyan (and his wife) a little)
Just now I used Search and discovered that I'd posted several boring
Knights-Knaves-Knarks puzzles 19 years ago. ::Gak!::
bad news: NovaBBS is gone
Good news: NewsGrouper lets me see and reply to posts from 19 years ago.
This is a great twist... I wish I had come up with it.
Where does the name Knark come from?
The easiest problems would be:
O says I am a Knight
A says 1+2=3, and 2+2=4
B says I am a Knark and I am a Knark
C says 1+2=3, and I am a Knark
D says I am a Knight, and I am a Knark
"James Dow Allen" <
jdallen2000@yahoo.com> posted:
Here are some more Knark puzzles. To save
bandwidth, problems are all very similar, but
solutions and deduction processes are dissimilar.
Puzzle 1
---------
Inspector Poirot checked his messages one morning
and was disappointed to see that there had been no
homicides during the night. He was so desperate
for a puzzle he almost tried the Sudoku in the newspaper
but instead hopped in his helicopter and went to visit
his friend Merowig, the Sheriff of Logician's Island.
``Any murder mysteries for me?'' he asked hopefully.
``No'', Merowig answered, ``but let me introduce you
to Abner, Billy, Clarissa, Daphne, and Edmund, each of
whom is a Knight, Knave or Knark. I'll let them
tell you which is which.''
Abner said
(a) ``Billy is a Knark.''
(b) ``Daphne is a Knave.''
Billy said
(c) ``Daphne is a Knark.''
(d) ``Edmund is a Knave.''
Clarissa said
(e) ``Abner is a Knark.''
(f) ``Billy is a Knark.''
Daphne said
(g) ``Edmund is a Knark.''
(h) ``Clarissa is a Knave.''
Edmund said
(i) ``Abner is a Knight.''
(j) ``Clarissa is a Knark.''
Could Poirot determine which tribe each of the five
islanders was from? Can you?
Puzzle 2
---------
Same as Puzzle 1, but change (b) to
(b) ``Clarissa is a Knave.''
Puzzle 3
---------
Same as Puzzle 1, but change (i) to
(i) ``Abner is a Knave.''
Puzzle 4
---------
Same as Puzzle 1, but change (i) to
(f) ``Billy is a Knight.''
Puzzle 5
---------
Same as Puzzle 1, but change (d) to
(d) ``Edmund is a Knight.''
Puzzle 6
---------
Same as Puzzle 1, but change (h) to
(h) ``Abner is a Knave.''
James Dow Allen
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