Hank is incorrect because not all square roots are rational.
In this case, \(\sqrt{25}\) is actually equal to 5, which is a rational number. However, the statement is true because there are square roots of other numbers, such as \(\sqrt{2}\) or \(\sqrt{3}\), which are irrational. So while \(\sqrt{25}\) itself is rational, the generalization that "all square roots are rational" is incorrect.