FUN

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0.1+0.2
0.30000000000000004

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var x = NaN;
console.log(x === x); // false
//To check if a value is NaN, you can use the isNaN() function.

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In set theory, the empty set is a subset of every set. 
This means that the empty set is even a subset of itself!

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In logic, the statement "This statement is false" is a paradox. 
If it is true, then it is false, and if it is false, then it is true.