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on 26 November 2007
As the other reviewer said, this is an excellent book. Smullyan's style is engaging and entertaining. The riddles are excellent, and follow a learning curve that means you can actually learn to cope with them as you go through the book (well, so long as you have a mind for these things, I guess). From the first puzzle (two roads, 1 leads to safety and the other one to death, a knave and a knight, 1 question) to the last (count dracula's castle, filled with crazy and sane vampires, humans and other assorted logical monsters, 3 questions to find out if dracula's alive), you will learn to progressively twist your mind further and further out of shape until your friends kick you out of the pub for throwing one too many fiendish puzzle at them!
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on 19 January 2014
I wish i could live in the same world as Raymond Smullyan! How does he get the time to think up these conundrums? Well, mostly it is his day job, and he gets paid to chat about these things to other academics. But what conversations! How i would love to be there. All of these problems are about language and how we use it, especially the words "true" and "false" and "lie", and about how complicated things can get if you think about those words hard enough -- while being far from dryasdust. you are drawn into a world where you have to think of a way of checking that your travelling companion is not a vampire, where you have a logical proof that Santa Claus exists, and Inspector Craig of Scotland Yard shows you how to analyse the meagre facts you have on suspects. My advice is buy this book, and lend it to nobody.
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on 11 February 2006
I cannot believe that no-one else has written a review of this book. It is a little gem, and opens up a world of mathematical logic for the casual reader. Smullyan has a sense of the ridiculous, and his world of lazy islanders, Count Dracula, Werewolves and others brighten what could be a dry subject in the hands of other authors.
Now, if you will excuse me, I am trying to remember the words taught to me by lions which, if uttered will completely stop everything in the worl...
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on 17 January 2014
I have brought several copies of this book for myself and friends. Written in a warm and light style it engages the reader and makes them think... This is also an enteratining book to share with children as it will help them develop a reasoning ability under a cloak of fun!
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on 6 August 2014
i am absolutely delighted that Dover have re-printed this and others of Smullyan's books. Fabulous and challenging.
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on 17 December 2014
Excellent book. It scales perfectly until you acquire a strong background on logic riddles.
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on 30 May 2015
Excellent content, marred by the quality of the printing
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on 12 August 2015
I am pleased with the book and gives me a lot of fun.
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on 16 December 2014
It's a Christmas present. It should go down well.
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on 28 January 2010
Excellent collection of logic puzzles, starting simple and gradually bending your mind more and more, while offering clear explanation along the way. By the end you will be able to negotiate with all manner of lying and insane mythical creatures.
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