This text critically examines the validity and limits of the Latin maxim "de principiis non est disputandum." The author argues that this principle is useful only when a discussion focuses on a specific topic interpreted through the participants' respective positions. However, when a dispute concerns the principles themselves, the maxim loses its relevance. Its universal application would render dialogue between parties with different foundations impossible. The text emphasizes that principles are not immutable dogmas but choices made by thinking individuals, whether consciously or by inheriting them from tradition. Therefore, principles should be subject to verification, critical control, and modification. The author advocates for rational disputation regarding the foundations of thought as a prerequisite for genuine communication. By rejecting the idea that principles are beyond dispute, the essay promotes openness in philosophical discourse and highlights the necessity of examining the underlying axioms that shape our understanding of the world.