On Wed, Jan 31, 2007 at 11:59:40AM -0200, Fernando Lukas Miglorancia wrote: > Brilhante resposta e mais brilhante ainda o paralelo traçado- muito > obrigado, Nicolau!
Obrigado pelos elogios, mas se o assunto é do seu interesse não deixe de fazer a busca pelo google que eu sugeri. O que eu escrevi é mínimo comparado com o que muita gente séria já escreveu e pensou sobre o assunto. Uma citacão: The story described above is the well-known Surprise Test Paradox, also known as the Class A Blackout, the Hangman Paradox, the Prediction Paradox, etc. It was circulated by word of mouth in the 1940s, and was first discussed in print in 1948 [OC]. Interestingly enough, the first few authors who discussed it viewed it simply as an example of a statement that could not be fulfilled, and were unaware of the potential "twist" at the end. It was not until 1951 that Scriven pointed out that the teacher can give the test and surprise the students [Sc]. Since then, numerous authors have discussed the problem and presented solutions, although none apparently definitive. (See [Ga] for an eminently readable introduction to the paradox, and [MB] for a thorough survey of the literature, with a bibliography listing 40 papers). JOSEPH Y. HALPERN AND YORAM MOSES TAKEN BY SURPRISE: THE PARADOX OF THE SURPRISE TEST REVISITED Journal of Philosophical Logic 15 (1986) 281-304. Alguns links: http://en.wikipedia.org/wiki/Unexpected_hanging_paradox http://plato.stanford.edu/entries/epistemic-paradoxes/ http://findarticles.com/p/articles/mi_qa3742/is_199801/ai_n8774321 []s, N. ========================================================================= Instruções para entrar na lista, sair da lista e usar a lista em http://www.mat.puc-rio.br/~nicolau/olimp/obm-l.html =========================================================================
