Work

Avicenna and Khūnajī on de re and de dicto modality

Year: 2025

Type: article

Abstract: Some scholars have claimed that Avicenna was the first logician to prove the Barcan formula, its converse, and the Buridan formula. However, I will show that this is not the case, and that Avicenna was not particularly concerned with implications between de re and de dicto modality. It is likely that Khūnajī was the first Arabic logician to explicitly endorse some implications between the de re and de dicto modality as well as the so-called Barcan formula, its converse, and the Buridan formula. In this paper, I have examined Khūnajī’s account of these implications.

Source: British Journal for the History of Philosophy

DOI: 10.1080/09608788.2025.2474541

Author: Behnam Zolghadr

Institution: Ludwig-Maximilians-Universität München

Language: English

Topic: Medieval and Classical Philosophy

Subfield: Philosophy

Field: Arts and Humanities

Domain: Social Sciences

Open Access status: bronze

Funder: Deutsche Forschungsgemeinschaft

Award: Logik und Ontologie bei Khūnajī und dessen Nachfolgern