CALM
Wednesday, April 27, 2011
10:28 AM
The CALM principle: 
CALM: Consistency As Logical Mononicity
A process is logically monotonic if additions to its input do not change its present output. 
Example: determining the keywords mentioned today on twitter is logically monotonic, because if we discover more keywords, that does not make us take anything out of the current solution set of keywords that appear. 
Example: determining the keywords that were not mentioned yesterday is not logically monotonic, because if we discover a new one that was mentioned yesterday, we have to take it out of the solution set. 
In other words, something is logically monotonic if once something is in the solution set, it always remains there. 