Here's Dennis' second question:
Question 2. Are all forms of painful pressure equally morally objectionable? In other words, are you willing to acknowledge that there are gradations of torture as, for example, there are gradations of burns, with a third-degree burn considerably more injurious and painful than a first-degree burn? Or is all painful treatment to be considered torture? Just as you, correctly, ask proponents of waterboarding where they draw their line, you, too, must explain where you draw your line.
Answer 2: All torture is "morally objectionable." It's furthermore not my job to determine what forms of "painful treatment" should be classified as torture. We have a system of laws for that. Waterboarding, for example, has been illegal since 1947.