The Truth About Lisp

Learning lisp will alter your life.

Your brain will grow bigger than you ever thought possible.

Paul Graham himself was completely written in lisp, by an earlier version of himself, also written in lisp, by an earlier version of lisp. It’s lisp, paul graham, lisp, paul graham, all the way down.

— Leon Bambrick

2011.01.27 Thursday ACHK

Anger

Written in anger

I once read that all good non-fiction books are written in anger.

At first I was taken aback by that. Then I realized [that] it was true.

If you do write a book, you are implicitly saying that the world needs this book.

Implicit in that is the accusation that the existing books are either incorrect or incomplete or both.

— How to Write, Publish, and Sell Your Own How-To Book

– John T Reed

2011.01.27 Thursday ACHK  

時間定義 7.1

為什麼要有「時間」這個概念呢?

那是因為我們要把不同的東西,用同一個標籤來指示。

例如,「十年前的你」和「現在的你」原本可以被定義為不同的人。「十年前的你」和「現在的你」無論在高矮肥瘦,或者思考想法都完全不同。把兩者定義為「不同的人」—— 前者叫做「甲」;後者叫做「乙」—— 並沒有大錯。那樣的話,「甲」和「乙」並沒有所謂「時間」的關係。

但是,如果你堅持「甲」和「乙」是同一個人,都是叫做「阿安」的話,你怎樣解釋「甲」和「乙」那些互不相容的性質呢?恰當的解釋是,因為「阿安」有「變化」:「阿安」由「2000 安」逐漸「變化成」「2010 安」。因為有「變化」,所以「甲」和「乙」的很多性質,例如身高,並不相同。

引入「變化」這個概念的話,「時間」概念就隨之而產生。例如,我們可以問,「甲」和「乙」有什麼關係呢?

「甲」其實是「乙」的「過去」;「乙」其實是「甲」的「將來」。「乙」是由「甲」變化而成的。他們都同樣叫做「阿安」。「他們」並不是「他們」,而是「他」。

— Me@2011.01.27

2011.01.27 Thursday (c) All rights reserved by ACHK