Minute differences in theory lead to

TehPhysicalist Published on May 17, 2012 a video of Richard Feynman lecturing on, e.g. how minute differences in theory can lead to great differences in outcome. [if anyone knows the date of this lecture, add it.]Newton’s ideas about space and time agreed with experiment very well, but in order to get the correct motion of the orbit of Mercury, which was a tiny, tiny difference, the difference in the character of the theory needed was enormous. The reason is that Newton’s laws were so simple and so perfect, and they produced definite results. In order to get something that would produce a slightly different result it had to be completely different. [— Richard Feynman, from "The Character of Physical Law"﻿]