— Me@2010.01.29

# Event symmetry

… so the principle of event symmetry states that the equations governing the laws of physics must be unchanged when transformed by any permutation of spacetime events.

More detailed studies have shown that different string theories in different background spacetimes can be related by dualities. There is also good evidence that string theory supports changes in topology of spacetime.

— Wikipedia on Event symmetry

2010.01.29 Friday ACHK

# Beauty 6

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— 許冠文

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— Me@2010.01.28

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2010.01.29 Friday $copyright ACHK$

# 原始時代

（安：但是近二百年來，人類的生活方式有極之巨大的改變。所以你說現在還算是原始時代有些牽強。）

（安：但是你又怎樣量度道德呢？）

（安：絕對是。例如第一次世界大戰時發明了機關槍。在有機關槍之前，不容易在短時間內殺死一大班人。）

— Me@2010.01.28