# Epistemic Skills: Reasoning about Knowledge and Oblivion

arXiv: https://arxiv.org/abs/2504.01733 · HTML: https://mlsanity.com/paper/2504.01733/

## Key facts

- No citing papers in the map yet (data through 14 Oct 2026).
- Builds on 5 of its 67 references that are in the map.
- First posted on arXiv 2 Apr 2025.

## Builds on (most cited first, 5 of 5)

- [Quantifying over Boolean announcements](https://mlsanity.com/paper/1712.05310/) (2017)
- [The Undecidability of Quantified Announcements](https://mlsanity.com/paper/2405.15671/) (2024)
- [Reasoning About Bounds in Weighted Transition Systems](https://mlsanity.com/paper/1703.03346/) (2017)
- [Field Knowledge as a Dual to Distributed Knowledge: A Characterization by Weighted Modal Logic](https://mlsanity.com/paper/2407.00687/) (2024)
- [Epistemic Skills: Logical Dynamics of Knowing and Forgetting](https://mlsanity.com/paper/2410.22763/) (2024)

## Abstract (arXiv)

This paper presents a class of epistemic logics that captures the dynamics of acquiring knowledge and descending into oblivion, while incorporating concepts of group knowledge. The approach is grounded in a system of weighted models, introducing an ``epistemic skills'' metric to represent the epistemic capacities tied to knowledge updates. Within this framework, knowledge acquisition is modeled as a process of upskilling, whereas oblivion is represented as a consequence of downskilling. The framework further enables exploration of ``knowability'' and ``forgettability,'' defined as the potential to gain knowledge through upskilling and to lapse into oblivion through downskilling, respectively. Additionally, it supports a detailed analysis of the distinctions between epistemic de re and de dicto expressions. The computational complexity of the model checking and satisfiability problems is examined, offering insights into their theoretical foundations and practical implications.