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Conservation of Information in Search: Measuring the Cost of Success
Abstract
Conservation of information theorems indicate that any search algorithm performs, on average, as well as random search without replacementunlessit takes advantage of problem-specific information about the search target or the search-space structure. Combinatorics shows that even a moderately sized search requires problem-specific information to be successful. Computers, despite their speed in performing queries, are completely inadequate for resolving even moderately sized search problems without accurate information to guide them. We propose three measures to characterize the information required for successful search: 1)endogenous information, which measures the difficulty of finding a target using random search; 2)exogenous information, which measures the difficulty that remains in finding a target once a search takes advantage of problem-specific information; and 3)active information, which, as the difference between endogenous and exogenous information, measures the contribution of problem-specific information for successfully finding a target. This paper develops a methodology based on these information measures to gauge the effectiveness with which problem-specific information facilitates successful search. It then applies this methodology to various search tools widely used in evolutionary search.
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Active information I+ = log(P*/Pmax) measures the amount of information added or subtracted when P* is used instead of Pmax; positive I+ means P* overfits, negative means underfits, and zero means extra assumptions do not contribute to cosmological tuning.
“A very efficient way to keep accountability is by calculating the active information I + = log( P ∗ /P max ) [42-44]. I + measures the amount of information added or subtracted when P ∗ is used instead of P max . If I + is positive, P ∗ is overfitting for ℓ X with respect to P max ; if I + is negative, P ∗ is underfitting the life-permitting interval with respect to P max ; and if I + = 0 , P ∗”
From Is cosmological tuning fine or coarse? (2021) · cites this paper as [42]
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Is cosmological tuning fine or coarse?
Díaz-Pachón, D. A., Hössjer, O., & Marks II, R. J. (2021) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2021/07/020 · Cited by 10
Self-citation
Metadata
- Authors
- Dembski, W. A., & Marks II, R. J.
- Affiliations
- Southwestern Baptist Theological Seminary (US)
- Venue
- IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans
- Published
- 2009-09
- Volume
- 39
- Issue
- 5
- Pages
- 1051-1061
- ISSN
- 1083-4427 (ISSN-L)
- OpenAlex
- W2157965697
- Cited by
- 59
- References
- 1
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 3 · 2023: 5 · 2022: 4 · 2021: 5 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 4 · 2014: 2 · 2013: 10 · 2012: 5
- FWCI
- 4.56
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- IEEE Transactions on Systems Man and Cybernetics - Part A Systems and Humans (publishedVersion)
- Topics
- Physical Sciences › Computer Science › Computational Theory and Mathematics › Computability, Logic, AI Algorithms
- Physical Sciences › Computer Science › Artificial Intelligence › Evolutionary Algorithms and Applications
- Physical Sciences › Computer Science › Artificial Intelligence › Metaheuristic Optimization Algorithms Research
- Keywords
- information conservation, search algorithms, endogenous information, exogenous information, active information, search difficulty, evolutionary search, information measures
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