Aristotle and the principle of non-contradiction

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The principle of non-contradiction (PNC) serves as both a law of being and a law of thought. Drawing from Aristotle's text, this book aims to explore the intuitive understanding of the PNC, highlighting its indemonstrability and foundational role in demonstrative sciences. Through the analysis of contradictory terms and confutational proof, key aspects of the PNC are identified in Aristotle's Metaphysics, particularly in book IV, where it is shown to emerge from being and safeguard the unity of thought against contradiction. The PNC defines being and reflects the non-contradictory nature of reality, indicating that denial of the PNC stems from a lack of understanding rather than an inherent contradiction in reality. The PNC stands as the highest criterion of significance in its ontological context. The book is structured into two main chapters: the first examines the PNC as a law of reality and thought, addressing various aspects such as contradictory beliefs and the nature of being. The second chapter discusses the PNC as an indemonstrable first principle, emphasizing the philosopher's role in understanding it, its unhypothetical nature, and its significance in demonstrations. The conclusion and bibliography provide further insights and references for deeper exploration.