Liar paradox - If this sentence were true, then what it says would be the truth, implying that it is false which is a contradiction, so if it were false then it is false that this sentence is false, hence it is true which is also a contradiction.

submitted by JasonCarswell from en.wikipedia.org

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[–]beermeem 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Wittgenstein would point out that you intended to lie. /u/JoJo’s explanation can be expand to include the implied understanding that you are attempting to truthfully observe the world. If you are intending to lie, then your statement loses relevance in the context of the conversation.

tl;dr: just read Wittgenstein. He explains all this.