6.1.1.10 Propositional calculus
Condition: Check the correctness of the reasoning. If I meet my friend, he and I will miss the first lesson. Either I will go to college early in the morning, or I will miss my first class. If I go to college early in the morning, I will meet my friend. Therefore, I will miss the first class only when I meet my friend.
Propositional calculus, also known as propositional logic, deals with propositions, which are statements that are either true or false. In this logic system, various problems and challenges arise when working with propositions and logical relationships.