Elementary Logic in Linear Space

Daniel Huang

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arXiv · 2001.11186

Elementary Logic in Linear Space

Daniel Huang

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Abstract

First-order logic is typically presented as the study of deduction in a setting with elementary quantification. In this paper, we take another vantage point and conceptualize first-order logic as a linear space that encodes "plausibility". Whereas a deductive perspective emphasizes how (i.e., process), a space perspective emphasizes where (i.e., location). We explore several consequences that a shift in perspective to "signals in space" has for first-order logic, including (1) a notion of proof based on orthogonal decomposition, (2) a method for assigning probabilities to sentences that reflects logical uncertainty, and (3) a "models as boundary" principle that relates the models of a theory to its "size".

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Daniel Huang. 2020-01-30. Elementary Logic in Linear Space. https://arxiv.org/abs/2001.11186

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