“In theory, there is no difference between theory and practice. In practice, there is.”
Often attributed to Yogi Berra, but research done at Snopes casts doubt on this.
http://www.snopes.com/quotes/berra/practicetheory.asp
I thought of this quote when I read E. Yudkowsky’s essay on The Map and the Territory.
Graphical quote of the day—The Periodic Table of Irrational Nonsense:
http://1.bp.blogspot.com/_RQjQvxtmK8A/TFiXItuYZ7I/AAAAAAAADMs/fYApM83k26s/s1600/Woo+Table+v2.0.png