# Ideal clock 1.3

An ideal clock is a clock (i.e., recurrent process) that makes the most other recurrent processes periodic.

— Wikipedia on Clock

The ideal clock itself is a meta-clock — a property of a set of clocks.

— Me@2015-04-16 9:35 AM

If you compare the accuracies of two clocks (A and B) by comparing each of them with a third clock (C), then I can ask, “How can you know that C is more accurate than both A and B?”

By defining the ideal clock as a meta-clock, we avoid infinite regress.

— Me@2015-04-27 11:36:59 AM

# Ideal clock 1.2

A clock is a recurrent process and a counter.

A good clock is one which, when used to measure other recurrent processes, finds many of them to be periodic.

An ideal clock is a clock (i.e., recurrent process) that makes the most other recurrent processes periodic.

— Wikipedia on Clock

The ideal clock itself is a meta-clock — a property of a set of clocks.

— Me@2015-04-16 9:35 AM

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The greatest gift is a portion of thyself.

— Ralph Waldo Emerson

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The greatest gift you can give someone is your time because when you are giving someone your time, you are giving them a portion of your life that you will never get back.

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2015.04.26 Sunday ACHK

# 玄悟慧能（審美篇）

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 This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.

— Me@2015.04.23

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# Quantum observer 1.3

Principle of Least Action, 7

If your consciousness do not see the superposition directly, you would not have been seeing the least action paths in the macroscopic world all the time.

— Me@2012.04.08

# 重複 2

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1. 你真的有神人指導嶄新的讀書方法，或者高人提供重大的學術資料；

2. 而你原本的成績只是差了一點點，只要下年每科升一個等級，就可以加入到你心儀的大學中，至愛的學系；

3. 再加上，你覺得即使在短短數十年的人生中，花足足一整年的額外時間成本，都算値得的話，

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1. 你已經用了老師、同學、朋友等，傳授給你的所有讀書心得；

2. 而你又想像不到，你在重讀年和第一年的學術生活，或者精神世界，風格會有什麼大分別的話，

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— Me@2015.04.17

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# Godel 19

… But it so happens that you just used second-order logic, because you talked about groups or collections of entities, whereas first-order logic only talks about individual entities.

— Standard and Nonstandard Numbers

— Eliezer Yudkowsky

— Less Wrong

2015.04.17 Friday ACHK

# Replay

stephengillie 64 days ago

In gaming, the concept is called a “replay”, where instead of recording the pixels on the screen in every frame, they instead record all inputs processed on every frame, and just replay them thru the same engine. The action is technically idempotent in the game world.

Where this breaks down is when features get updated between revisions. If your game patched the “jump” function to increase upward momentum from 1.1 m/s to 1.13 m/s, the Replay would be incorrect. You would be jumping onto platforms you couldn’t get up to before, moving faster, maybe even dodging enemy attacks that hit you when you played that match.

The human neuroprocessor is always changing and growing, always revising itself. Thus memories replay incorrectly. You apply old feelings to new mental patterns, and sometimes they lead to weird places. Or sometimes you mistake something easy for being difficult, because your memory data is out-of-date for your current processes.

— Hacker News

2015.04.16 Thursday ACHK

# 機遇再生論 1.4

『機遇再生論』的大概意思是，所有可能發生的事情，例如重生，只要等足夠長的時間，總會發生。

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— Me@2015.04.08

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# Consistent histories, 5

consistent histories ~ quantum decoherence

— Me@2012.04.08

# 重複

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（CYW：如果這次高考，到了最後，都考不上大學，我應不應該重讀，下年再考多一次？）

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— Me@2015.04.10

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# The Beginning of Time, 6

B is to the north of A

~ B is between A and the North Pole

B is to the north of North Pole

~ B is between the North Pole and the North Pole

Therefore, the phrase “north of North Pole” is meaningless.

— Me@2015-04-06 12:48 AM

# What Is it Like to Be a Bat?

Feeling is a relationship between a particular observer and a particular observed.

So the question of “whether the color red I see is the same as the color red you see” is logically meaningless.

— Me@2015-04-06 1:13 PM

If observer B can get the memory of observer A, it is logically possible to feel another mind’s feelings (to a certain extend).

In that situation, the question of “whether B’s feeling of seeing the color red is the same as A’s” is meaningful.

— Me@2015-04-07 03:58:46 PM

# 機遇再生論 1.3

『機遇再生論』的大概意思是，所有可能發生的事情，例如重生，在無限長的未來時間中，必會發生。

『機遇再生論』的大概意思是，所有可能發生的事情，例如重生，只要等足夠長的時間，總會發生。

— Me@2015.04.08

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6.54

My propositions serve as elucidations in the following way: anyone who understands me eventually recognizes them as nonsensical, when he has used them — as steps — to climb beyond them. (He must, so to speak, throw away the ladder after he has climbed up it.)

He must transcend these propositions, and then he will see the world aright.

— Tractatus Logico-Philosophicus

— Ludwig Wittgenstein

Before climbing a ladder, it is higher than you; after, you are higher than it.

— Me@2011.07.31