Mensagens

A mostrar mensagens de Outubro, 2012

Jan Łukasiewicz

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"When I became aware of the incompatibility of traditional theorems of modal propositions in 1920, I was in the process of establishing a normal bivalent propositional calculus based on the matrix method. At that time I was convinced that it was possible to demonstrate all the thesis of the ordinary propositional calculus assuming that propositional variables could take on only two values, "0" (false), and "1" (true). This assumption corresponds to the basic theorem that every proposition is either true or false. For brevity's sake, I will refer to it as the law of bivalence. Although it is sometimes referred to as the law of excluded middle, I prefer to restrict this latter term to the well known principle of classical logic which states that two contradictory propositions cannot both be false at the same time.

Our whole system of logic is based on the law of bivalence, even though it has been fiercely disputed since ancient times. Aristotle knew this la…

Setun

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The Most Beautiful Girl

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Santol

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Kola

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Akee

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http://en.wikipedia.org/wiki/Akee

Pouteria caimito

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Clausena lansium

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Papua, 1976

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деятельность

Ebru

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Amaranthus retroflexus

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Avishai Cohen live

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Cathedral

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O homem da gaita

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A cultura do nabo

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楽焼

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Dívida

Schuld II

(...) Another significant aspect was that the debt service depended on how much the German economy could afford to pay, taking the country’s reconstruction and the export revenues into account. The debt service/export revenue ratio was not to exceed 5%. This meant that West Germany was not to use more than one twentieth of its export revenues to pay its debt. In fact it never used more than 4.2% (except once in 1959). In any case, since a large portion of the German debts were paid in deutsche marks, the German central bank could issue money, or in other words monetise the debt.
Another exceptional measure was that interest rates were substantially reduced (between 0 and 5%).Daqui.

Um sítio onde pousar a cabeça

Scenes from the Class Struggle in Portugal

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Initial conditions

It may happen that small differences in the initial conditions produce very large differences in the final phenomena. A small error in the former produces an enormous error in the latter. Prediction becomes impossible, and we are faced with a phenomenon of chance. Poincaré, 1908

Essential hinduism

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Subtle is the lord

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Dashavatara

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Inspiration

"Inspiration that ignores life and is itself ignored by life is not inspiration but a state of possession." M. M. Bakhtin, Art and Answerability

Barsalou

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Endeavour

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Felix

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In Conversation with Daniel Kahneman

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Compêndios de Matemática de Sebastião e Silva

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The Collected Papers of Albert Einstein, Volume 13: The Berlin Years: Writings & Correspondence, January 1922 - March 1923 (Documentary Edition)

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The private life of the brain

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Brain Story

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Brain

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Na FCG.

Amadora BD 2012

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Ananda Shankar

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"Mature" economies

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British debt

American debt

Schuld

Alvíssaras ao responsável

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Hörður Torfason

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Iceland economic crisis

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The new shock of the new

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Golden monkey

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Yoshiharu Tsuge

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Finger monkey

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Miniature horse

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The Psychedelic Explorer's Guide

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Open source brick machine

How to change the world

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Titica

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4.ª carta aberta aos associados do Montepio

Ícaro

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A pele que há em mim

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Black dynamite

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Agostinho da Silva

"- Oh, Amélia! Passamos o tempo cheios de projectos para a vida mas nunca deixamos a vida mostrar-nos os projectos que ela tem para nós .... (...) "
George Agostinho Baptista da Silva

World history

"What counts as an object is precisely what world history turns out to be about."
Donna Haraway

The shock of the new

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