anything that should be shared must be shared

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馬克思、恩格斯《共產黨宣言》

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恩格斯《社會主義從空想到科學的發展》

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Unlikely Pairs (Bob Raczka's Art Adventures)

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What is Mathematical Logic? by C. J. Ash , J. N. Crossley, C. J. Brickhill, J. C. Stillwell, N. H. Williams

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Outlines of a Formalist Philosophy of Mathematics by H.B.Curry

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Thinking about Mathematics: The Philosophy of Mathematics by Stewart Shapiro

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Philosophy of Science - A Very Short Introduction, by Samir Okasha

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All my friends are dead by Avery Monsen, Jory John

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〈助人為演化之本〉／〈冠羽畫眉　同舟共濟〉

掃瞄自《科學人》雜誌 2012 年 8 月號。

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侯世達：囚犯兩難電腦競賽與合作的演化（孫興文譯）

To open the google document, please click here.

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An Unfortunate Dualist by Raymond M. Smullyan

To open the google document, please click here.

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Cardinal and ordinal numbers by Wacław Sierpiński

Originally downloaded from bookfi.org, in *.djvu format. The DjVu document can be downloaded here.

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也斯〈李大嬸的袋錶〉

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On Gödel by Jaakko Hintikka

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The Complexity of Cooperation by Robert Axelrod

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The Evolution of Cooperation by Robert Axelrod

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仍在唱一首低沉的民歌－廖偉棠訪問鄧阿藍

明報周刊，廖偉棠訪問鄧阿藍