Question:

Principles: X propounds the principle that everyone in this world always speaks lies.
Facts: X wants to know whether this principle is logically true or false.

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Absolute universal statements like "everyone" and "always" often fail under logical scrutiny because they include the speaker and create self-referential contradictions.
Updated On: Aug 12, 2025
  • logically the principle may be true
  • even-one in the whole of this world does not always speak lies
  • logically X is also speaking lies
  • even-one is basically an honest person
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The Correct Option is C

Solution and Explanation

Let us analyse the statement made by X step-by-step.
X claims that "everyone in the world always speaks lies". This statement includes all human beings without exception.
If we apply this statement to X himself, then X is also a part of "everyone" in the world. Therefore, according to his own principle, he must also always speak lies.
Now, if X always speaks lies, then his present statement — that everyone always lies — must itself be a lie.
If the statement is a lie, that means not everyone always speaks lies; at least some people sometimes tell the truth.
This creates a contradiction known as the "liar paradox" in logic, where a statement refers to itself in a way that makes it logically impossible to be consistently true.
Therefore, the only consistent conclusion we can draw from the principle and facts is that logically X is also speaking lies when he makes this universal claim.
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