切勿为自己独特的想法而恐惧，因为我们现在所接受的常识都曾是独特的。
Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.
The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.
The uniformity of the hybrids in the first generation, the dissimilarity in the second, are facts which cannot escape the attention of an accurate observer.