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 Or sometimes you mistake something easy for being difficult, because your memory data is out-of-date for your current processes.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

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

2015.04.09 Thursday (c) All rights reserved by ACHK

Memory 5.4

這段改編自 2010 年 7 月 29 日的對話。

(HSY:會考剛放榜,我的物理成績只有 C。所以,學校當局很可能會,不容許我選修高考物理,而要我改為選修,例如,「數學與統計」科。

現在,我要去和負責相關事項的老師,討論這個問題。那樣,我應該要講些什麼,才可以有機會說服到他,給我選修物理呢?)

你試試這樣:

在對話中,你要不斷重複著,同一個意思,以示你有無比的決心,去讀好物理科;但是,你又千萬不要,明顯地重複著,同一個說話,以免對方覺得你,沒有禮貌。

換句話說,你要用無限句不同的說話,去表達同一個意思,例如:

甲 = 你 

乙 = 對方

乙:…

甲:我其實很喜歡物理。

乙:…

甲:我真的很喜歡物理。

乙:…

甲:你講得很有道理,不過,我對物理的信心,大過數學很多。

乙:…

甲:但是,我讀的數學天份,沒有物理那麼高。

乙:…

甲:我也有考慮這一點,但是,我如果讀物理,我的父母會安心一點。

乙:…

甲:讀物理的話,我奪得好成績的機會,會大很多。

乙:…

甲:…

— Me@2014.06.20

2014.06.21 Saturday (c) All rights reserved by ACHK

Consciousness 4

Event Realism 3.2 | 事件實在論 3.2 | Cumulative concept of time, 17.2

being conscious

~ having one’s own past information

~ having memory

~ having self-interaction

~ entanglement between past states and the present state

~ some of the past states keep existing through memories and records

~ past-self-and-present-self entanglement

— Me@2013-11-01 7:02 AM

2013.11.03 Sunday (c) All rights reserved by ACHK

Information 2

Event Realism 3 | 事件實在論 3 | Cumulative concept of time, 17 | Recursion 8.3 | I am a Strange Loop, 3.3

memory ~ information of the past

Part of the past still exists, in the sense that some states and events of the past are entangled with those of the present.

— Me@2013-10-09 6:50 PM

2013.10.23 Wednesday (c) All rights reserved by ACHK

The 6th Day

Copy Me, 7

The 6th Day is a 2000 American science fiction action thriller film directed by Roger Spottiswoode, starring Arnold Schwarzenegger as family man Adam Gibson, who is cloned without his knowledge or consent in the future of 2015.

— Wikipedia on The 6th Day

This movie has helped me to understand that identity is memory and memory is software.

— Me@2013-02-14 10:55:47 AM

2013.02.14 Thursday (c) All rights reserved by ACHK

Memory 5.3

這段改編自 2010 年 4 月 3 日的對話。

大明比小明聰明。小明在很多時候,處事能力沒有大明那麼高。所以,大部分情況下,大明的考試分數,都會比小明好。小明發覺沒有辦法,單憑智力去戰勝大明,長期心有不甘。於是,有一次,小明想暗算大明。但是,由於大明比小明足智多謀,他在事前就已經可以,化解了小明的詭計。

這篇文章,內廢而外不廢。

這篇文章,其實就好像「變形金剛」中的機械人。首先,原本只有一隻。然後,我把它複製成多四隻。接著,再把那五隻機械人,變成五種不同的形態。那樣,就可以把它們合體,變成一隻「大機械人」。

— Me@2012.10.12

2012.10.12 Friday (c) All rights reserved by ACHK

Memory 5.2

這段改編自 2010 年 4 月 3 日的對話。

你會發現,我網誌的部分文章,其實只是在不斷重複,同一句說話。

通常,我每篇文章只有一個重點。但是,我會利用不同的句子,去不斷重複那一個重點。你閱讀時是不易察覺的,因為那些句子,雖然是在講同一個重點,但拼砌在一起時,會貌似一篇有上文下理的故事。例如:

大明比小明聰明。小明在很多時候,處事能力沒有大明那麼高。所以,大部分情況下,大明的考試分數,都會比小明好。小明發覺沒有辦法,單憑智力去戰勝大明,長期心有不甘。於是,有一次,小明想暗算大明。但是,由於大明比小明足智多謀,他在事前就已經可以,化解了小明的詭計。

這篇文章,內廢而外不廢。

— Me@2012.10.11

2012.10.11 Thursday (c) All rights reserved by ACHK

Memory 4.5

Copy Me, 5.4

這段改編自 2010 年 4 月 3 日的對話。

另外,寫自傳時,你要知道,你的回憶未必是實情。記憶,就是把「客觀事件」,化成「主觀紀錄」的過程。要保證自傳的真確,就要人證物證俱在。換句話說,你應該把「主觀記憶」和「客觀記憶」比對,包括 信件、文件 和 他人的記憶 等。 

— Me@2012.10.08

2012.10.08 Monday (c) All rights reserved by ACHK

在那一年

Memory 4.4 | Copy Me, 5.3 | Memento 4

這段改編自 2010 年 4 月 3 日的對話。

根據我的經驗,近乎只有一個情況,會令我真正明確回憶起,中學時代的某一件特定事件。那就是當收拾房間,整理一大堆物件的時候,偶然會見到那個時代的一些「紀念品」,例如 成績表、筆記、書籍、相片 和 電影戲票 等。

所以,為免遺失原本的自我,你應定期收集和保存「紀念品」,作為人生的「里程碑」。「紀念品」就好像是「記憶保險箱的鎖匙」,助你隨時喚醒多年前的詳細記憶,令你重遇年輕時的自己。你的信件、文章 和 作品,往往就是最佳的「紀念品」。

— Me@2012.10.06

2012.10.06 Saturday (c) All rights reserved by ACHK

Memory

.

I have collected in this book memories extending over fifty years.

I am well aware that memory is unreliable.

It not only selects and rearranges that facts of our lives, but also embroiders and invents.

I have checked my version of facts wherever possible against other people’s memories and against written documents.

.

– Freeman Dyson’s Disturbing the Universe

.

.

.

2009.09.05 Saturday ACHK

Memory 4.3

Copy Me, 5.2

這段改編自 2010 年 4 月 3 日的對話。

「十年前的我」和「現在的我」的記憶不盡相同,而導致不是「同一個人」,有兩重意思。

第一重是,「現在的我」(三十歲)比「十年前的我」(二十歲),多了十年的記憶。那就是我剛才所講的「增加」。

第二重是,即使只比較人生頭二十年的記憶,「三十歲的我」回憶(例如)「十六歲那年」發生了什麼事,已經不及「二十歲的我」回憶「十六歲那年」那麼詳細和準確。那就是我剛才所講的「變形、刪減 和 篡改」。

更震撼的是,如果我真的問你,「十六歲那年」發生了什麼事,你可以答到的,可能不出十件,甚至只有一兩件事。震撼的地方在於,「十六歲那年」共有 365 日,而你竟然只講到不夠十件事情。「十六歲那年」對於一個「三十歲的人」來說,只一堆模糊的印象,記憶的疑團。

根據我的經驗,近乎只有一個情況,會令我真正明確回憶起,中學時代的某一件特定事件。那就是當收拾房間,整理一大堆物件的時候,偶然會見到那個時代的一些「紀念品」,例如 成績表、筆記、書籍、相片 和 電影戲票 等。

— Me@2012.10.03

2012.10.03 Wednesday (c) All rights reserved by ACHK

Individual neurons

snippyhollow 192 days ago | link

A neuron “could” store a generalized memory (the amount of information it stores is gigantic, w/o pendantically considered the DNA). However, it’s more complex than that (there are many types of memories and many means of retrieval). Basically, memories are sets of synaptic connections, and a neuron has many synapses (average ~7,000 synaptic connections/neuron to multiply by our 10^11 neurons/brain).

As you said, it may be a “key”, but it should be seen more like the memory _is_ a complete list of hashes. Not {“key”: memory} but {“key1”: {“key2”: {“key3”: {…} } }, {…}, {…}, …} and the set of {key1..keyN} is the memory. So if you removed whichever keyI in the middle, you lose the information.

(That’s not really true because there is high redundancy, but there are keys/synapses/nodes less redundant than others. The fact is, they don’t fire on only “one” neuron, they fire at a very precise region but the light still goes through a population of neurons.)

— MIT discovers the location of memories: Individual neurons

— Hacker News

2012.10.02 Tuesday ACHK

Memory 4.2

Copy Me, 5

這段改編自 2010 年 4 月 3 日的對話。

怎樣才為之「同一個人」,或者「同一個自我」呢?

洛克(John Locke)的標準是,有同一個記憶,就為之同一個自我。

但是,即使是同一個人的記憶,又會隨時間 變形、增刪、篡改。如果用洛克的標準,我們平時所講「同一個人」之中的「同一」,只是幻覺。即使是「同一」個人,其實「自我」亦在不斷變化之中。例如,「十年前的我」和「現在的我」,並不是完全相同的「同一個人」。

— Me@2012.10.01

2012.10.01 Monday (c) All rights reserved by ACHK

Memory 4

這段改編自 2010 年 4 月 3 日的對話。

正常健康的腦袋,不會記下所有東西,而會把經驗過濾,把握重點記下,把其他遺忘。所以,記憶既不是事實的全部,亦未必是事實的真相。記憶時常會不完整,甚至不準確。

一個簡單的實驗,就可以證實,「記憶」和「事實」,並非百份百相乎。你可以試試再看,一部以前看過的電影。你會發現,電影中的很多細節,和你的記憶不一致,甚至相反。例如,你記得某輛車明明是在畫面的左邊,重看時,卻發現它竟然在右邊。

— Me@2012.09.29

2012.09.29 Saturday (c) All rights reserved by ACHK

Memento 4

They were right. Lists are the only way out of this mess.

Here’s the truth: People, even regular people, are never just any one person with one set of attributes. It’s not that simple. We’re all at the mercy of the limbic system, clouds of electricity drifting through the brain. Every man is broken into twenty-four-hour fractions, and then again within those twenty-four hours. It’s a daily pantomime, one man yielding control to the next: a backstage crowded with old hacks clamoring for their turn in the spotlight. Every week, every day. The angry man hands the baton over to the sulking man, and in turn to the sex addict, the introvert, the conversationalist. Every man is a mob, a chain gang of idiots.

This is the tragedy of life. Because for a few minutes of every day, every man becomes a genius. Moments of clarity, insight, whatever you want to call them. The clouds part, the planets get in a neat little line, and everything becomes obvious. I should quit smoking, maybe, or here’s how I could make a fast million, or such and such is the key to eternal happiness. That’s the miserable truth. For a few moments, the secrets of the universe are opened to us. Life is a cheap parlor trick.

But then the genius, the savant, has to hand over the controls to the next guy down the pike, most likely the guy who just wants to eat potato chips, and insight and brilliance and salvation are all entrusted to a moron or a hedonist or a narcoleptic.

The only way out of this mess, of course, is to take steps to ensure that you control the idiots that you become. To take your chain gang, hand in hand, and lead them. The best way to do this is with a list.

— Memento Mori

— Jonathan Nolan

2012.08.17 Friday ACHK