Analyzing the Logical Structure
Welcome, fellow traveler on the path to JEE mastery. Today, we are not just solving a problem; we are peeling back the layers of a logical structure. Logic is the bedrock of all mathematics, and understanding it is like learning the secret language of the universe.
Let us dive into the statement p→(∼q∨r)≡F.
The Implication Trap
Imagine you are standing before a grand gate. The statement p→(∼q∨r) is a logical gate, and we are told it is False.
In the world of propositional logic, an implication A→B is a promise. It says, "If A is true, then B must be true." The only way this promise is shattered—the only way the entire statement becomes False—is if the premise A is True, but the conclusion B is False.
In our specific case, A is p and B is (∼q∨r). Therefore, for the entire expression to be False, we must have:
This is our first major breakthrough. We have already determined the truth value of p! It must be True.
The Disjunction Rule
Now, let us turn our attention to the second part: (∼q∨r)≡F. This is a disjunction, an "OR" statement.
Think of an OR statement as a team effort. For the team to fail (be False), every single member must fail. If even one member succeeds, the team succeeds.
Thus, for the disjunction (∼q∨r) to be False, both components must be False:
Look at the elegance of this! We have immediately found the value of r. It is False. We are now left with the final piece of our puzzle: ∼q≡F.
The Final Deduction
We are at the finish line. We have ∼q≡F. This is the negation of q.
If the negation of q is False, then q itself must be the opposite. It must be True. Let us collect our findings like precious gems:
When we put them together, we get the sequence T,T,F. It is a beautiful, clean result.
You see, logic isn't about memorizing tables; it's about visualizing the flow of truth. You have successfully navigated the implication, dismantled the disjunction, and arrived at the truth.