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JACIII Vol.14 No.5 pp. 475-486
doi: 10.20965/jaciii.2010.p0475
(2010)

Paper:

The Search for a Search: Measuring the Information Cost of Higher Level Search

William A. Dembski* and Robert J. Marks II**

*Center for Science & Culture, Discovery Institute, Seattle, WA 98104, USA

**Dept. of Electrical & Computer Engineering, Baylor University, Waco, TX 76798, USA

Received:
September 19, 2009
Accepted:
April 1, 2010
Published:
July 20, 2010
Keywords:
No Free Lunch Theorems, active information, active entropy, assisted search, endogenous information
Abstract

Needle-in-the-haystack problems look for small targets in large spaces. In such cases, blind search stands no hope of success. Conservation of information dictates any search technique will work, on average, as well as blind search. Success requires an assisted search. But whence the assistance required for a search to be successful? To pose the question this way suggests that successful searches do not emerge spontaneously but need themselves to be discovered via a search. The question then naturally arises whether such a higher-level “search for a search” is any easier than the original search. We prove two results: (1) The Horizontal No Free Lunch Theorem, which shows that average relative performance of searches never exceeds unassisted or blind searches, and (2) The Vertical No Free Lunch Theorem, which shows that the difficulty of searching for a successful search increases exponentially with respect to the minimum allowable active information being sought.

Cite this article as:
W. Dembski and R. II, “The Search for a Search: Measuring the Information Cost of Higher Level Search,” J. Adv. Comput. Intell. Intell. Inform., Vol.14, No.5, pp. 475-486, 2010.
Data files:
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