# 時光機 2

It is possible to affect the past, but not to change it.

The Novikov Principle does not allow a time traveller to change the past in any way, but it does allow them to affect past events in a way that produces no inconsistencies — for example, a time traveller could rescue people from a disaster, and replace them with realistic corpses seconds before it occurs.

— Wikipedia on Novikov self-consistency principle

# 背誦製成品 2

Pure Maths 7

Past papers 21

（LWT: 那樣說的話，即是那些 proof（證明）都要自己懂如何做出來？）

（LWT: 即是出得多的，就為之重要？）

— Me@2010.04.25

— Me@2010.05.24

# 化妝品

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— Me@2010.04.24

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2010.04.25 Sunday $copyright ACHK$