We did not start as friends, but as people who respected and admired each other. Crucial, absolutely crucial for a partnership. As soon as we could afford it, we ceased sharing lodgings. Equally crucial.

— Teller (entertainer)

— 14 years ago: the day Teller gave me the secret to my career in magic

— Brian Brushwood



2012.02.29 Wednesday ACHK


Meta 2

“You know what’s great about the YC network? It gives the benefit of being part of a large company without being part of a big company,” Graham says. “The problem with doing a startup–even though it’s better in almost every other respect–is that you don’t have the resources of a big company to draw on. It’s very lonely; you have no one to give you advice or help you out. In a big company, you might be horribly constrained, but there are like 1,000 other people you can go to to deal with any number of problems. Now [with YC] you have 1,000 people you can go to to deal with problems, and you don’t have all the restrictions of a big company.”

— Paul Graham: Why Y Combinator Replaces The Traditional Corporation

— Austin Carr

2012.02.29 Wednesday ACHK


Another thing to consider is your definition of results. It’s possible that you could do every right … but still your business fail, …

There are some things that simply not in your control, and there are times when you have to define “results” in a different way than you might have thought:

Yes, my business is going through a rough time. But what am I discovering? What strengths am I gaining? What increased capacity will I have to apply to future efforts?

Even when the observable results appear to be negative, you can still make huge progress …

— The Speed of Trust, p.116

— Stephen M. R. Covey, Rebecca R. Merrill

2012.02.28 Tuesday ACHK

Enjoy everything, need nothing, 2.2

種子論起點 12.3 | 兩次測驗 2



如果你「需要」有好成績,才會感到有自信的話,每次在學業上遇到挫折時,你都會覺得那是對 自身人格 和 自我價值 的一個否定。那樣,溫習時,你會戰戰兢兢,自然不能得心應手;考試時,你會惶惶不安,自然不可揮灑自如。沒有豁達的心靈,就沒有靈活的頭腦。你一定不會是一個一流的學生。



把手緊握 什麼都沒有  把手放開 你得到一切  — 臥虎藏龍

— Me@2012.02.28

2012.02.28 Tuesday (c) All rights reserved by ACHK

Logical arrow of time, 2

However, the right definition of the past and the future is independent of these sign conventions for spacetime coordinates. The right definition says that

    The future is evolving from the past (and the present).

Correspondingly, the calculations that are designed to theoretically mimic this evolution have the same arrow:

    The future is calculated from the past (and the present) as long as we use the usual calculations that resemble the evolution.

It’s important that you can’t exchange the words “future” and “past” in the sentence above.

That doesn’t mean that science can never say anything about the past, by manipulating with the present data or the data from a closer past. But this type of calculation is different from predictions of the future. It follows different formulae, too. They’re the formulae of logical inference, e.g. Bayesian inference.

And as we have explained many times, the results of this inference – the retrodictions – always depend on our priors. So the knowledge of the present is enough to calculate the future (classically) or to predict the unique probabilities of various states in the future (quantum mechanically). But it is simply never enough to calculate the unique state or unique probabilities of various states in the past.

— Logical arrow of time and terminology

— Lubos Motl

2012.02.28 Tuesday ACHK


Universal wave function, 14

Quantum decoherence makes the macroscopic world appear definite.

In fact, Nature is fundamentally a superposition of definite states.

So the world, either microscopic or macroscopic, is definite in a sense that the universal wave function is evolving deterministically; and

is indefinite in a sense that it is not in a particular eigenstate.

— Me@2011.11.19

2012.02.27 Monday (c) All rights reserved by ACHK

John T. Reed

Pursuit of money, fame, and status generally does not produce a bumper crop of friends and friendly relatives in old age. Indeed, those goals are selfish and selfishness is not a way to make friends. Furthermore, money, fame, and status tend to attract false friends which may get in the way of your acquiring [of] real ones.

— John T. Reed



2012.02.26 Sunday ACHK

Enjoy everything, need nothing, 2.1

種子論起點 12.2






— Me@2012.02.26



2012.02.26 Sunday (c) All rights reserved by ACHK

Everett’s relative-state formulation

Universal wave function, 13

Everett noticed that the unitary, deterministic dynamics alone decreed that after an observation is made each element of the quantum superposition of the combined subject-object wavefunction contains two “relative states”: a “collapsed” object state and an associated observer who has observed the same collapsed outcome; what the observer sees and the state of the object have become correlated by the act of measurement or observation. The subsequent evolution of each pair of relative subject-object states proceeds with complete indifference as to the presence or absence of the other elements, as if wavefunction collapse has occurred, which has the consequence that later observations are always consistent with the earlier observations. Thus the appearance of the object’s wavefunction’s collapse has emerged from the unitary, deterministic theory itself. (This answered Einstein’s early criticism of quantum theory, that the theory should define what is observed, not for the observables to define the theory). Since the wavefunction appears to have collapsed then, Everett reasoned, there was no need to actually assume that it had collapsed. And so, invoking Occam’s razor, he removed the postulate of wavefunction collapse from the theory.

— Wikipedia on Everett’s relative-state formulation

2012.02.26 Sunday ACHK

Single-world interpretation, 6.5

If this is the case, then wave function is deterministic. There is no free will. The free will is due to the ongoing superposition of eigenstates. Locally, we see superposition of “a and b” collapse to (such as) a. Globally, we also see b “goes to” the environment. Nothing is lost in a sense that no information is lost.

Then what happens when you make a choice by collapsing a wave function?

Free will, like wave function collapse, is a local illusion.

Since information cannot be lost, we always exist.

— Me@2011.11.20

2012.02.25 Saturday (c) All rights reserved by ACHK


Meta 1.2 | Recursion 9.2

如何拯救眾生 3


Now, the common paradigm is that the teacher-student ratio is critical — fewer students means higher-quality teaching. But if you turn your students into teachers, you gain leverage. You move the fulcrum over.

– The 8th Habit p. 32, by Stephen Covey




2008.10.24 Friday ACHK

種子論起點 11.0.2

這段改編自 2010 年 3 月 20 日的對話。



大概而言,你需要不斷散播種子,但又不知道哪些會發芽。你幾乎完全不能控制,哪些種子會長大成樹、開花結果。但你又不能不播種,因為沒有「種子」,就一定不會有「結果」。你所能做到的,就只是勤奮地,盡量提高「種子發芽、長大成樹 和 開花結果」的機會率。




— Me@2010.03.21

— Me@2010.09.26

— Me@2012.02.20



2012.02.22 Wednesday (c) All rights reserved by ACHK

Single-world interpretation, 6.2

In the Many-worlds interpretation (MWI), when we say that “a + b” collapses to “a”, there is a shift of definition of “you”.

MWI is in one sense correct: choice b version of you still exists. But the trick is that he is not in another universe. He is in the environment of this universe.

And perhaps in reverse, you are also part of the environment of him.

— Me@2011.11.20

2012.02.22 Wednesday (c) All rights reserved by ACHK