"Observation that in many (if not most) cases only a very small amount (the 'tip') of information is available or visible about a situation or phenomenon, whereas the 'real' information or bulk of data is either unavailable or hidden. The principle gets its name from the fact that only about 1/10th of an iceberg's mass is seen outside while about 9/10th of it is unseen, deep down in water."
Sounds much like the knowledge available through the forum?
But then you all knew that anyway, didn't you?? :wink: