conceptual

I take this to be a fundamental logical principle of rationality: that whatever you are already committed to believing restricts what else you can believe (without revising what you are already committed to believing). This is enough to derive some version of the principle of non-contradiction, all that is required is recognizing that this relation be recognized as being none other but what we call “negation”. The basis motivation behind the main and only premise of this argument is that rationality has to do not only with what one ought to believe or not ex nihilo , but what one ought to believe or not given what we already do believe or not. This basic principle can be decomposed in four different principles: What one believes restricts what one can believe or not What one believes restricts what one ought to believe or not What one does not believe restricts what one can believe or not What one does not believe restricts what one ought to believe or not Let us focus on the first on