Inconsistency-Induced Learning for Perpetual Learners

Inconsistency-Induced Learning for Perpetual Learners

Du Zhang, Meiliu Lu
Copyright: © 2011 |Pages: 19
DOI: 10.4018/jssci.2011100103
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Abstract

One of the long-term research goals in machine learning is how to build never-ending learners. The state-of-the-practice in the field of machine learning thus far is still dominated by the one-time learner paradigm: some learning algorithm is utilized on data sets to produce certain model or target function, and then the learner is put away and the model or function is put to work. Such a learn-once-apply-next (or LOAN) approach may not be adequate in dealing with many real world problems and is in sharp contrast with the human’s lifelong learning process. On the other hand, learning can often be brought on through overcoming some inconsistent circumstances. This paper proposes a framework for perpetual learning agents that are capable of continuously refining or augmenting their knowledge through overcoming inconsistencies encountered during their problem-solving episodes. The never-ending nature of a perpetual learning agent is embodied in the framework as the agent’s continuous inconsistency-induced belief revision process. The framework hinges on the agents recognizing inconsistency in data, information, knowledge, or meta-knowledge, identifying the cause of inconsistency, revising or augmenting beliefs to explain, resolve, or accommodate inconsistency. The authors believe that inconsistency can serve as one of the important learning stimuli toward building perpetual learning agents that incrementally improve their performance over time.
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How to build lifelong learners for intelligent agent systems has been an important agenda item in the field (Mitchell, 2006; Thrun & Mitchell, 1995; Thrun, 1995, 1998). Reports of some initial research results toward this long-term objective have emerged recently.

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