Christopher Nolan, 2 | 時空幻境 4 | Braid 4


1998 Following
2000 Memento
2002 Insomnia
2005 Batman Begins
2006 The Prestige
2008 The Dark Knight

2010 Inception
2012 The Dark Knight Rises
2014 Interstellar
2017 Dunkirk
2020 Tenet



1998 《Following》

2000 《凶心人》


2002 《白夜追兇》

2005 《俠影之謎》

2006 《死亡魔法》


2008 《黑夜之神》

2010 《潛行凶間》


2012 《夜神起義》

2014 《星際啓示錄》


2017 《鄧寇克大行動》

2020 《天能》

A lot of Nolan’s movies are about some kinds of time travel.

For those movies, each has a unique time logic. Each is like a stage of the computer game Braid.

In Braid, there are 6 stages. Each stage has a unique time mechanics.

— Me@2020-09-20 10:36:54 AM



2020.09.25 Friday (c) All rights reserved by ACHK

太極滅世戰 2.1

似水流年 2.2



近乎唯一娛樂就是看電視。那時,我還沒有電腦,更加沒有互聯網。那時,沒有什麼金錢買玩具。就算有新玩具,我有時會想:「怎麼辦呢? 很快又會厭倦。」


中途又有些所謂的嗜好,例如集郵,其實沒有意義。相對沒有那麼無聊的,有電腦遊戲。我的摯愛有 Simcity 2000 和 Chrono Trigger 等。但那也只是暫時的快樂,仍未能為我生活,帶來意義;遊戲完結時,感到額外的空虛。









幸好,後來發現,那不是事實。至起碼,中五會考物理,並不需要高智力,也可以奪得 A 級成績。十多年後,在自己有足夠的讀書和教學經驗後,我發現,我當年不懂做題目,主因是日校物理教師,只談理論,不會教題目細節。甚至,有些課題,例如電學,連他自己也根本不太認識。

一九九六年的那個暑假,我開始參加 Ken Chan 的物理補習班,開始一步一步的,解決了「空有目標,沒有執行之道」這問題。


— Me@2020-07-27 07:33:45 AM



2020.08.03 Monday (c) All rights reserved by ACHK

Simcity, 2


I bought this SimCity 2000 box in 1995. It was the first time I went to a big computer centre (mall).

At the first glance, I thought that it was sold at the price 800 HKD, which I could not afford. Luckily, the price label was actually NT800, which meant 800 New Taiwan Dollars.

So I could buy it at 200 Hong Kong Dollars.

— Me@2019-12-29 03:42:26 PM



2019.12.29 Sunday (c) All rights reserved by ACHK

點石成金 8

The Metagame, 2



For a boring but unavoidable task, add an amazing context.

For an interesting but useless activity, add a meaningful context.

For example, I use video games to train my courage.

— Me@2011.08.24

— Me@2019-12-12



2019.12.12 Thursday (c) All rights reserved by ACHK


E: Can you just, you know, like, just tell me the answer?

J: Sorry?

E: You know, the answer. To everything.

What’s the point of love if it’s just disappear?

There has to be meaning to existence, otherwise the universe is made of pain and I don’t like the thought of that.

So, tell me the answer!

J: The more human I become, the less things make sense.

But that’s part of the fun. Right?

E: What do you mean?

J: If there were an answer I can give you to, how the universe works, it wouldn’t be special. It would be just a machinery fulfilling its cosmic design. It would be just a big, dumb food processor.

But, since nothing seems to make sense, when you find something or someone that does, it’s euphoria.


In all of this randomness, in this pandemonium, you and Chidi found each other and you had a life together.

Isn’t that remarkable?

E: Pandemonium is from Paradise Lost. Milton called the center of hell “pandemonium”, meaning “place of all demons”.

I guess all I can do is to embrace the Pandemonium.

Find happiness in the unique insanity of being here, now.

— The Good Place



2019.01.27 Sunday ACHK



Structure and Interpretation of Classical Mechanics (SICM) is a classical mechanics textbook written by Gerald Jay Sussman and Jack Wisdom with Meinhard E. Mayer. The first edition was published by MIT Press in 2001, and [the] second edition was released in 2015. The book is used at the Massachusetts Institute of Technology to teach a class in advanced classical mechanics, starting with Lagrange’s equations and proceeding through canonical perturbation theory.

— Wikipedia on Structure and Interpretation of Classical Mechanics



2019.02.02 Saturday ACHK

Donkey Kong Country


Donkey Kong Country is a 1994 platform game developed by Rare and published by Nintendo for the Super Nintendo Entertainment System (SNES). The game centres on Donkey Kong and his friend Diddy Kong, who are on a quest to recover Donkey Kong’s stolen banana hoard from King K. Rool and the Kremlings.

— Wikipedia on Donkey Kong Country



2018.04.13 Friday ACHK

潛行凶間 16.3

Inception 16.3

這段改編自 2010 年 8 月 13 日的對話。







3. 多重自我

3.1 每一個人,其實有超過一個自我。

3.2 而每一個自我,其實有超過一個層次的意識。








— Me@2018-04-08 10:51:30 AM



2018.04.08 Sunday (c) All rights reserved by ACHK



Quark and Sakonna are sharing the same cell.

I hope you’re happy.

I am a Vulcan. My emotional state is irrelevant.

Well I’m a Ferengi. And my emotional state is very relevant. And right now, I’m miserable. And it’s all your fault.

You were well paid for your assistance.

Not well enough. Look, why don’t you just tell them what they want to know?

Sakonna just stares at him.

DEEP SPACE: “The Maquis, II” – 02/17/94 – ACT FOUR 42.


(continuing, talking confidentially) I know the Cardassians can’t be trusted. I know that the Central Command would like nothing better than to destroy the Federation colonies in the Demilitarized Zone.

Then you agree with our position?

Not for a second.

Why not?

Because your position is… (searching for the right word) Illogical.

This takes Sakonna off guard.

Do you propose to lecture me on logic?

I don’t want to, but you leave me no choice. It all comes down to the third Rule of Acquisition.

(off her blank reaction)

You don’t know that one, do you?

I am not well versed in Ferengi philosophy.

Remind me to get you a copy of the Rules. You never know when they’ll come in handy. Now, the third rule clearly states,

Never pay more for an acquisition than you have to.

Logical. But I fail to see how that applies to my situation.

DEEP SPACE: “The Maquis, II” – 02/17/94 – ACT FOUR 43.


You want to acquire peace. Fine.

Peace is good. But how much are you
willing to pay for it?

Whatever it costs.

That’s the kind of irresponsible spending that causes so many business ventures to fail.

You’re forgetting the third rule. Right now peace could be bought at a bargain price and you don’t even realize it.

I find this very confusing.

Then I’ll make it so simple that even a Vulcan can understand. The Central Command has been caught red-handed smuggling weapons to their settlers. So from now on, every ship approaching the Demilitarized Zone will be searched. Without the support of the Central Command, the Cardassian settlers won’t be so eager to fight.

You forget the weapons they already have.

They have weapons… you have weapons… everyone has weapons. But right now, no one has a clear advantage. So the price of peace is at an all-time low. This is the perfect time to sit down and hammer out an agreement. Don’t you get it… attacking the Cardassians now will only escalate the conflict and make peace more expensive in the long run. Now I ask you, is that logical?

Quark sits down, pleased with his performance.

— Star Trek: Deep Space Nine



2018.03.16 Friday ACHK

潛行凶間 16.2

Inception 16.2

這段改編自 2010 年 8 月 13 日的對話。



2. 多層夢









— Me@2018-03-08 08:32:52 PM



2018.03.08 Thursday (c) All rights reserved by ACHK

On Lisp


Lisp is an especially good language for writing extensible programs because it is itself an extensible program.

Because Lisp gives you the freedom to define your own operators, you can mold it into just the language you need. If you’re writing a text-editor, you can turn Lisp into a language for writing text-editors. If you’re writing a CAD program, you can turn Lisp into a language for writing CAD programs. And if you’re not sure yet what kind of program you’re writing, it’s a safe bet to write it in Lisp. Whatever kind of program yours turns out to be, Lisp will, during the writing of it, have evolved into a language for writing that kind of program.

— On Lisp: Advanced Techniques for Common Lisp

— Paul Graham



2018.02.21 Wednesday ACHK

潛行凶間 16

Inception 16

這段改編自 2010 年 8 月 13 日的對話。







1. 清醒夢

1.1 有些人在某些時候,在夢知道自己在發夢,卻又可以保持住,發夢的狀態。

1.2 那些人之中的部分人,在那些清醒夢時候的部分時候,甚至可以控制著,那些夢境的劇情演變。







2. 多層夢

有時,明明已經起了床,關掉了鬧鐘;怎料,「明明已經起了床,關掉了鬧鐘」這劇情,只是另一個夢 — 我仍然未醒來。

3. 多重自我

3.1 每一個人,其實有超過一個自我。

3.2 而每一個自我,其實有超過一個層次的意識。

— Me@2018.02.18



2018.02.18 Sunday (c) All rights reserved by ACHK


Toy Story

A Bug’s Life

Toy Story 2  

Monsters, Inc.

Finding Nemo

The Incredibles




Toy Story 3

Inside Out

— Me@2016-10-21 03:11:28 PM

2016.10.21 Friday ACHK

Intellectual Headaches

Game design

They got the key, and then some other stuff happened, and then they reached the door, and were able to open it; but “acquiring the key” and “opening the door” were stored as two separate, disconnected events in the player’s mind.

If the player had encountered the locked door first, tried to open it, been unable to, and then found the key and used it to open the door, the causal link would be unmistakable. You use the key to open the locked door, because you can’t open the locked door without the key.

Math education

I’ve drawn parallels between game design and education before, but it still took me a while to realize that problem-solution ordering issues crop up just as often in the classroom as they do in games.

Remember how, in high school math class, a lot of the work you were doing felt really, really pointless?

Consider Dan Meyer’s question for math educators: if math is the aspirin, then how do you create the headache?

In other words: if you introduce the solution (in this case, a new kind of math) before introducing the kind of problems that it’s meant to solve, the solution is likely to come across as pointless and arbitrary. But if you first let students try to tackle these problems with the math they already understand, they’re likely to come away with a kind of intellectual “headache” – and, therefore, to better understand the purpose of the “aspirin” you’re trying to sell.

Functional programming

— Locked doors, headaches, and intellectual need

— 27 October 2015

— Affording Play

Here are some excerpts of an elegant essay. Please go to the author’s website to read the whole.

— Me@2015-11-03 03:46:41 PM

2015.11.03 Tuesday ACHK

Person of Interest

Person of Interest is an American science fiction crime drama television series created by Jonathan Nolan that premiered on September 22, 2011, on CBS. It is executive produced by Nolan, alongside J. J. Abrams, Bryan Burk, and Greg Plageman. It stars Jim Caviezel as John Reese, a former CIA agent who is presumed dead. He is approached by a mysterious billionaire named Harold Finch (Michael Emerson), who is trying to prevent violent crimes before they happen by using an advanced surveillance system dubbed “The Machine”, which turns out to have evolved into a sentient AI.

— Wikipedia on Person of Interest (TV series)

2015.10.05 Monday ACHK

如何拯救眾生 2

How to improve the world indefinitely?



There is law of conservation of energy.
There is law of conservation of mass.
But, there is no law of conservation of ideas.


— Me



If you have an apple and I have an apple, and we exchange apples, we both still only have one apple. But if you have an idea and I have an idea, and we exchange ideas, we each now have two ideas.

— George Bernard Shaw



. . . it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it. Its peculiar character, too, is that no one possesses the less, because every other possesses the whole of it. He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.

That ideas should freely spread from one to another over the globe, for the moral and mutual instruction of man, and improvement of his condition, seems to have been peculiarly and benevolently designed by nature, …

— Thomas Jefferson




2008.10.21 Tuesday (c) All rights reserved by ACHK