[ This sentence is a lie ]
A: This statement (A) is false.
If (A) is true, then "This statement is false" is true. Therefore, (A) must be false. The hypothesis that (A) is true leads to the conclusion that (A) is false, a contradiction.
If (A) is false, then "This statement is false" is false. Therefore, (A) must be true. The hypothesis that (A) is false leads to the conclusion that (A) is true, another contradiction. Either way, (A) is both true and false, which is a paradox.
This tool is temporary and permanent.
I'm lying now.
Seungbin Yang
@studio_seungbinyang