public static function isEqual(...$ruts)
    {
        // If the user passed down one single argument as an array, we will use
        // that and unwrap it.
        if (is_array($ruts[0]) && func_num_args() === 1) {
            $ruts = $ruts[0];
        }

        // First, restore the keys of the array.
        $ruts = array_values($ruts);

        // Clean every value
        foreach ($ruts as &$rut) {
            $rut = self::cleanRut($rut);
        }

        // To see if all the ruts are equal we will remove the duplicates values.
        // Doing this should reduce the array to only 1 non-empty item, which
        // means that all the ruts are equal. Otherwise, they're not equal.
        return count($ruts = array_unique($ruts)) === 1 && !empty($ruts[0]);
    }