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Metamagische thema's op zoek naar de…

Metamagische thema's op zoek naar de essentie van geest en patroon (original: 1985; edição: 1988)

de Douglas R. Hofstadter

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2,325155,011 (4.07)17
Hofstadter's collection of quirky essays is unified by its primary concern: to examine the way people perceive and think.
Título:Metamagische thema's op zoek naar de essentie van geest en patroon
Autores:Douglas R. Hofstadter
Informação:Amsterdam Contact 1988
Coleções:Sua biblioteca

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Metamagical Themas: Questing for the Essence of Mind and Pattern de Douglas R. Hofstadter (1985)


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Not as good as Hofstedter's incomparable "Goedel Escher Bach", with which there is slight overlap. A few essays (for example, the Rubik's Cube one) did not much interest me, but there is plenty here for everyone. Very worthwhile and highly recommended for both general reader and scientist. ( )
  KENNERLYDAN | Jul 11, 2021 |
This is a collection of the columns Douglas Hofstadter wrote for Scientific American when he took over Martin Gardner's regular "Mathematical Games" column. (The name of this book and of Hofstadter's column is an anagram of the name of Gardner's column.) In my opinion, a few of the highlights of this book are:

(1) On pages 37-41, at the end of a chapter on self-referential sentences (i.e., sentences that refer to themselves), Hofstadter presents a short story by David Moser entitled "This is the Title of This Story, Which is Also Found Several Times in the Story Itself" that is made up of self-referential sentences. I thought this story was hilarious in a Monty-Pythonesque sort of way, but your mileage may vary.

(2) Chapter 29 is a fascinating discussion of "Prisoner's Dilemma Computer Tournaments". The Prisoner's Dilemma is a scenario in which two individuals each make (in secret) a decision to cooperate with the other individual or to "defect" instead. If you both cooperate, you both get rewarded. If one cooperates and the other defects, the defector gets a higher reward and the cooperator receives a penalty. If both
defect, nothing happens. This scenario gets its name from the idea of two suspects being interrogated for a crime for which the police have a moderate amount of circumstantial evidence implicating the pair. Should a suspect rat his accomplice out or keep quiet? This chapter discusses tournaments in which individuals write computer programs to participate in a succession of prisoner's dilemma games with other programs. One of the more successful programs was a fairly simple one called TIT FOR TAT, which would cooperate on its first encounter with another program and then, on all subsequent encounters with that program, would do what the other program did on their immediately preceding encounter.

(3) Chapter 31, entitled "Irrationality is the Square Root of All Evil", reports on the "Luring Lottery" that Hofstadter set up for readers of his column. Hofstadter offered a cash prize to be awarded to one entrant in this contest. Entrants would each send in a number on a postcard which could be thought of as the quantity of lottery tickets being requested by that person. In other words, all else being equal, his/her odds of winning the prize would be proportional to the number he/she submitted. The catch is that the size of the prize would be $1,000,000/W, where W is the sum of all the numbers submitted, so it would have been in the interest of the group of entrants as a whole not to submit outrageously large numbers. This was something of a cooperate-or-defect dilemma like that mentioned in (2), and as might be guessed many entrants defected (some quite spectacularly). Hofstadter was obviously depressed by the results of his contest, feeling that it was a metaphor for many of society's problems. He announced his resignation from his column in the issue of Scientific American in which this chapter originally appeared. (The timing may have been coincidental; I don't recall.) ( )
  cpg | May 16, 2020 |
Trite, boring.

Update a day later:
Covers topics similar to those covered in Godel, Escher, Bach, but not nearly in as entertaining a manner, the intellectual depth is lame, the Lisp stuff is boring to someone who already is familiar with at least one computer language, which presumably is more than half of the audience for any Hofstadter book, the Prisoner's Dilemma material covers ground that has been well-trod over the decades by many, many, many people - though perhaps this is something that a non-economist reader wouldn't know - the attempts to tie the subject matter of many of the chapters to nuclear war at the end are thunderingly unsubtle (maybe this was less noticeable when these articles originally appeared spread over months or years), the material on creativity is an attempt to pad an idea fit for five pages over tens of pages. Etc.

Some authors write several great books. Some authors are one-book authors. Hofstadter is the latter. Read GEB. Don't read anything else by this guy, certainly not Metamagical Themas or the execrable I am a Strange Loop. ( )
  Carnophile | Nov 2, 2014 |
While this is not exactly a review, I thought I'd leave a few comments here. I recently got this on Kindle, so I've been slowly revisiting a few choice bits here and there. For what it's worth, I was dumbfounded to see this was available on Kindle. Given that his most popular and best selling book Gödel, Escher, Bach is still not available for Kindle, I took it for granted that none of his books were available on Kindle (except, perhaps, I am a Strange Loop, published, if I recall correctly, after Kindles were already on the market).

Anyway, after downloading this, I started flipping through the chapters wondering which I should reread and was a bit stunned to be reminded that there are 3 chapters on Lisp. What's interesting about this is imagining this text appearing in Scientific American. While I have fond memories of what SciAm used to be, it's hard to gel that with the image of SciAm that I currently have in my head. The days of meaty, tangible material in technical magazine that you could actually sit down and do something with (c.f., Byte), seem so long ago (Make and the recently deceased, in print format, Linux Journal, not withstanding) that it's hard to picture actual articles on Lisp appearing in what was, in fact, a fairly popular science magazine. This is not to say that SciAm is not still of good quality, but it's certainly a very different beast than what it used to be. These days, I would basically call it a nicer version of Discover (again, not to denigrate that magazine, but it certainly lacks depth in most cases).

To be continued...

( )
1 vote tlockney | Sep 7, 2014 |
This book has probably influenced my brain chemistry in all sorts of subtle and stealthy ways. I think I've read it at least four times. ( )
  JenneB | Apr 2, 2013 |
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Nome do autorFunçãoTipo de autorObra?Status
Douglas R. Hofstadterautor principaltodas as ediçõescalculado
Dabekaussen, EugèneTradutorautor secundárioalgumas ediçõesconfirmado
Lange, Barbara deTradutorautor secundárioalgumas ediçõesconfirmado
Maters,TillyTradutorautor secundárioalgumas ediçõesconfirmado
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Hofstadter's collection of quirky essays is unified by its primary concern: to examine the way people perceive and think.

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