Map and territory
Less confusing than saying "belief and reality", "map and territory" reminds us that a map of Texas is not the same thing as Texas itself. Saying "map" also dispenses with possible meanings of "belief" apart from "representations of some part of reality".
Since our predictions don't always come true, we need different words to describe the thingy that generates our predictions and the thingy that generates our experimental results. The first thingy is called "belief", the second thingy "reality".
- Qualitatively Confused by Eliezer Yudkowsky - Using qualitative, binary reasoning may make it easier to confuse belief and reality; if we use probability distributions, the distinction is much clearer.