Researchers have proven that the plan existence problem in modal logic is undecidable. This problem involves determining if a sequence of epistemic actions can achieve a specified goal, given an initial state and a set of actions. The proof holds even when action preconditions have a modal depth of one and there are no postconditions, resolving a previously unknown question about the problem's decidability. AI
Summary written by gemini-2.5-flash-lite from 2 sources. How we write summaries →
IMPACT Establishes theoretical limits for AI planning agents operating in epistemic domains.
RANK_REASON Academic paper published on arXiv detailing a theoretical proof.