Necessity and Possibility of the Symmetry Bias: How Can We Model Human Unconscious Thinking?

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  • 対称性バイアスの必然性と可能性： 無意識の思考をどうモデル化するか
  • タイショウセイ バイアス ノ ヒツゼンセイ ト カノウセイ ムイシキ ノ シコウ オ ドウ モデルカスルカ

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Symmetry bias is sometimes regarded as a culprit that results in fallacies and spoils our logically correct reasoning. We believe, however, that this bias is also indispensable if we are to obtain unfamiliar notions, to think creatively, and to infer heuristically. We devised an algorithm which can overcome the “exploration-exploitation dilemma” that is involved in the decision-making process under conditions of uncertainty, via a computer simulation based on the “2-armed Bandit Problem.” As a result, we confirmed that the agent-model, which contains both kinds of symmetry biases, displayed very flexible behavior, and that it achieved drastically higher scores than the other mechanical agents. In this paper, by drawing upon the theory of ‘Bi-logic’ as developed by Matte Blanco, we discuss why human-beings require this kind of illogicality, and how fundamental it is for human [un]consciousness.

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