Logic of Hypotheses: from Zero to Full Knowledge in Neurosymbolic Integration

Fuente: arXiv
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Main Authors: Bizzaro, Davide, Daniele, Alessandro
Format: Preprint
Published: 2025
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author Bizzaro, Davide
Daniele, Alessandro
author_facet Bizzaro, Davide
Daniele, Alessandro
contents Neurosymbolic integration (NeSy) blends neural-network learning with symbolic reasoning. The field can be split between methods injecting hand-crafted rules into neural models, and methods inducing symbolic rules from data. We introduce Logic of Hypotheses (LoH), a novel language that unifies these strands, enabling the flexible integration of data-driven rule learning with symbolic priors and expert knowledge. LoH extends propositional logic syntax with a choice operator, which has learnable parameters and selects a subformula from a pool of options. Using fuzzy logic, formulas in LoH can be directly compiled into a differentiable computational graph, so the optimal choices can be learned via backpropagation. This framework subsumes some existing NeSy models, while adding the possibility of arbitrary degrees of knowledge specification. Moreover, the use of Gödel fuzzy logic and the recently developed Gödel trick yields models that can be discretized to hard Boolean-valued functions without any loss in performance. We provide experimental analysis on such models, showing strong results on tabular data and on two NeSy tasks with a perceptual component.
format Preprint
id arxiv_https___arxiv_org_abs_2509_21663
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Logic of Hypotheses: from Zero to Full Knowledge in Neurosymbolic Integration
Bizzaro, Davide
Daniele, Alessandro
Machine Learning
Artificial Intelligence
Logic in Computer Science
Neurosymbolic integration (NeSy) blends neural-network learning with symbolic reasoning. The field can be split between methods injecting hand-crafted rules into neural models, and methods inducing symbolic rules from data. We introduce Logic of Hypotheses (LoH), a novel language that unifies these strands, enabling the flexible integration of data-driven rule learning with symbolic priors and expert knowledge. LoH extends propositional logic syntax with a choice operator, which has learnable parameters and selects a subformula from a pool of options. Using fuzzy logic, formulas in LoH can be directly compiled into a differentiable computational graph, so the optimal choices can be learned via backpropagation. This framework subsumes some existing NeSy models, while adding the possibility of arbitrary degrees of knowledge specification. Moreover, the use of Gödel fuzzy logic and the recently developed Gödel trick yields models that can be discretized to hard Boolean-valued functions without any loss in performance. We provide experimental analysis on such models, showing strong results on tabular data and on two NeSy tasks with a perceptual component.
title Logic of Hypotheses: from Zero to Full Knowledge in Neurosymbolic Integration
topic Machine Learning
Artificial Intelligence
Logic in Computer Science
url https://arxiv.org/abs/2509.21663