Big Data Computing

48 Big Data Computing

of very young assertions in the body is high, the KO might be not resistant

to stochastic changes, which is not healthy. Otherwise, if only long-living

assertions form the body, it means that the KO is either in a wrong context

or too resistant to mutagens. Both are bad as no new information is added,

the KO ignores changes, and hence the ontology it carries may become irrel-

evant. Therefore, a good mix of young and old assertions in the body of

a KO indicates high tness—KO’s knowledge is overall valid and evolves

appropriately.

Of course stating that tness depends only on the numbers of used and

excreted asser ...