1n1 = !!true // !!truthy returns true
2n2 = !!{} // !!truthy returns true: any object is truthy...
3n3 = !!(new Boolean(false)) // ...even Boolean objects with a false .valueOf()!
4n4 = !!false // !!falsy returns false
5n5 = !!"" // !!falsy returns false
6n6 = !!Boolean(false) // !!falsy returns false