Satisfiability for Knowing How over Linear Plans is NP-complete

2026-05-19Logic in Computer Science

Logic in Computer Science
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Authors
Carlos Areces, Pablo Barceló, Valentin Cassano, Pablo F. Castro, Stéphane Demri, Raul Fervari
Abstract
We study the satisfiability problem for a modal logic expressing knowing-how assertions, which captures an agent's ability to achieve a given goal under the standard semantics based on linear plans. Our main result shows that satisfiability of knowing-how formulas is NP-complete, improving previously known complexity bounds. The proof proceeds via a translation into modal logic S5, an instrumental tool for addressing a variety of problems in knowledge representation.