 Hello and welcome to the session. In this session, we are going to discuss truth tables. We are already familiar with the truth value of a statement. Let us recall, if a statement is true, its truth value is D and if a statement is false, its truth value is F. So, a truth table may be defined as, when we represent the truth value of the statements in the form of a table, then the table formed is called the truth table. For example, if the statement P is true, then not P is false and if the statement P is false, then not P is true. Now, let us represent this information in the form of a table. In the first column, we write the truth values of the statement P and in the second column we write the truth values of the statement not P. If P is true, the truth value of P is D and the corresponding truth value of not P will be F. And if P is false, the truth value of P is F and the corresponding truth value of not P is T. Now, let us see the truth table for conjunction P and Q and disjunction P or Q. We know for P and Q we have the following truth values. If both P and Q are true, then P and Q is true. If P is true and Q is false, then P and Q is false. If P is false and Q is true, then P and Q is false. If both P and Q are false, then P and Q is also false. Now, let us write its truth table. In the first column, we write the truth values of P. In the second column, we write the truth values of Q. And in the third column, we write the truth values of P and Q. If P is true and Q is true, then P and Q is also true. And if P is true, Q is false, then P and Q is false. If P is false, Q is true, then P and Q is false. And if both P and Q are false, then P and Q is also false. Now, we will write the truth values of P or Q. We know for P or Q we have the following truth values. If both P and Q are true, then P or Q is also true. If P is true and Q is false, then P or Q is true. If P is false and Q is true, then P or Q is true. And if both P and Q are false, then P or Q is also false. So in this table, we make one more column to write the truth values of P or Q. So here, if P is true, Q is true, P or Q is true. If P is true, Q is false, P or Q is true. If P is false, Q is true, then P or Q is true. And if both P and Q are false, then P or Q is also false. Thus, we can form the truth table for the statements. This completes our session. Hope you enjoyed the session.