Name: Henio Santos de Almeida
Type: MSc dissertation
Publication date: 04/03/2022
Advisor:

Name	Role
José Renato Salatiel	Advisor *

Examining board:

Name	Role
Cassiano Terra Rodrigues	External Examiner *
Edélcio Gonçalves de Souza	External Examiner *
José Renato Salatiel	Advisor *
Thana Mara de Souza	Internal Alternate *

Summary: The subject of this dissertation is the treatment given by the Polish philosopher and logician
Jan Łukasiewicz (1878–1956) to the Principle of Non-Contradiction (PC) in his critical study
O zasadzie sprzeczności u Arystotelesa (1910). First, we offer a brief contextualization of the
genesis of this author’s thinking, and then we begin a detailed analysis of the content of his
book. Such content is presented in two parts: (1) the analysis offered by Łukasiewicz on the PC
in its Aristotelian formulation; and (2) the formulation of the PC that the Polish philosopher
himself undertakes. Finally, we expose and review the main criticisms raised by Łukasiewicz’s
book, in order to know if there are any that are capable of invalidating all his arguments.

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