Solution Horizons:

"In Eysenck's (1985a, 1986a, 1987b) theory of intelligence, speed of information-processing is a crucial ingredient, itself a consequence of (comparatively) error-free cortical processing. What, in such a scheme, would be the role of creativity? Any meaningful mental search process which has some empirical support requires qualification of the search domain in terms of relevance. Given a particular problem, we only search our memory store in terms of the requirement of that problem. Given the problem: 

1 3 6 10 15 21 ? 

we do not draw upon our knowledge of the causes of the Peleponesian War, or the quantum mechanics 'graviton' theory of gravitation; we confine ourselves to a heuristic search for numerical solutions fitting the progression indicated by the problem. Any problem defines its solution horizon, limiting its search to a given, circumscribed area. While Campbell, Simonton and Furneaux do not formally state such a limitation on their concepts of random or blind search, it does not seem likely that they would disagree and would insist on a truly blind/ random search involving the whole of our knowledge background. However, they fail to introduce the important concept of relevance, which clearly needs explicit treatment - particularly as it is a vital component of creativity."

Genius, H. J. Eysenck