Hole In The Wall


今日の英語:If a tree falls in a forest,


GEICO Did You Know - A tree does make a sound ...


"If a tree falls in a forest and no one is around to hear it, does it make a sound?" is a philosophical thought experiment that raises questions regarding observation and knowledge of reality.


If a tree falls in a forest - Wikipedia, the free encyclopedia

 今日のNPRの"Car Talk"でも出てきたんで、やっぱり"Everybody knows that"なんだろう。