Restate the following statements with appropriate conditions, so that they become true.

(i) If a² > b², then a > b.

(ii) If x² = y², then x = y.

(iii) If (x + y)² = x² + y², then x = 0.

(iv) The diagonals of a quadrilateral bisect each other.

Given that all women are mortal, and suppose that A is a woman, what can we conclude about A?

Given that the decimal expansion of irrational numbers is non-terminating, non-recurring, and $\sqrt{17}$ is irrational, what can we conclude about the decimal expansion of $\sqrt{17}$ ?

Given that y = x² + 6 and x = -1, what can we conclude about the value of y?