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== Methodology ==
The architecture and components of a given learning classifier system can be quite variable. It is useful to think of an LCS as a machine consisting of several interacting components. Components may be added or removed, or existing components modified/exchanged to suit the demands of a given problem ___domain (like algorithmic building blocks) or to make the algorithm flexible enough to function in many different problem domains. As a result, the LCS paradigm can be flexibly applied to many problem domains that call for [[machine learning]]. The major divisions among LCS implementations are as follows: (1) Michigan-style architecture vs. Pittsburgh-style architecture, {{Explain | reason = it is not clear what these architectures are or how they are different}} (2) [[reinforcement learning]] vs. [[supervised learning]], (3) incremental learning vs. batch learning, (4) [[Online machine learning|online learning]] vs. [[offline learning]], (5) strength-based fitness vs. accuracy-based fitness, and (6) complete action mapping vs best action mapping. These divisions are not necessarily mutually exclusive. For example, XCS,<ref name=":10" /> the best known and best studied LCS algorithm, is Michigan-style, was designed for reinforcement learning but can also perform supervised learning, applies incremental learning that can be either online or offline, applies accuracy-based fitness, and seeks to generate a complete action mapping.
=== Elements of a generic LCS algorithm ===
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