# 層壓式推銷 3

（安：我用另一個方式來表達：如果有一個方法可以賺到大錢的，叫做方法 A 。而作者又不去用方法 A 來賺錢，而反而去寫一本教人如何用方法 A 賺錢的書。

— Me@2010.02.03

# Dust Theory

Greg Egan’s Dust Theory

The first known publication of the idea of event symmetry is in a work of science fiction rather than a journal of science. Greg Egan used the idea in a short story called “Dust” in 1992 and expanded it into the novel Permutation City in 1995. Egan used dust theory as a way of exploring the question of whether a perfect computer simulation of a person differs from the real thing. However, his description of the dust theory as an extension of general relativity is also a consistent statement of the principle of event symmetry as used in quantum gravity.

— Wikipedia on Event symmetry

2010.02.03 Wednesday ACHK

# 妻子

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— Me@2010.02.02

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2010.02.03 Wednesday $copyright ACHK$