Universal claims about empty sets are all true, because there are no falsifying instances.
NOTE: Claims about empty sets are trivially true. Sure, “all irrational prime numbers are odd” because there are no irrational prime numbers, but it is equally true that “all irrational prime numbers are even”.
— Tutorials, PL 120 Symbolic Logic I, Fall 2011
— Professor H. Hamner Hill
2012.09.22 Saturday ACHK
結果為本
p. xii How can we discern whether NDErs are truly blessed by divine light or deceived by the Prince of Darkness? No less an authority than Jesus gave us the methodology when he said, “By their fruits ye shall know them” (Matthew 7:20).
— Lessons from the Light
— by Kenneth Ring
好樹結好果
2012.09.22 Saturday ACHK
歷史意識 2
這段改編自 2010 年 4 月 12 日的對話。
換句話說，讀歷史時，你要「親歷其境」，有第一身的感受。那樣，你才可以真切了解人性。
歷史科（或者其他文科）的真諦，在於令你極端深刻地，了解人性。
記住，讀理科的目的是，學習「物理定律」；讀文科的目的則是，學習「人情定律」。
— Me@2012.09.22
2012.09.22 Saturday (c) All rights reserved by ACHK
Physics Town 