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    Negation (NOT)

    Rumman Ansari July 14, 2025 282 views

    đŸšĢ Negation (NOT)

    In logic, Negation means saying the opposite of something.

    It is written as:

    👉 ~p

    (or sometimes just ¬p)
    Read as: “NOT p”

    🧠 What does it mean?

    Negation changes the truth value of a statement:

    • If something is True (1) → NOT makes it False (0)

    • If something is False (0) → NOT makes it True (1)

    🔄 Real-Life Example:

    Let’s say:

    • p = "It is raining."

    Then:

    • ~p = "It is NOT raining."

    So, if p is True (yes, it is raining), then ~p is False (no, it's not raining — which would be a lie).

    đŸ”ĸ Truth Table for ~p (Using 0 and 1)

    p ~p
    0 1
    1 0
     

    📌 Summary:

    Statement p NOT p (~p) Meaning
    0 (False) 1 (True) If the statement is false, then "not" makes it true
    1 (True) 0 (False) If the statement is true, then "not" makes it false
     

    🎉 Tip:

    Negation is like flipping a switch:

    • ON becomes OFF

    • YES becomes NO

    • TRUE becomes FALSE