I can't find what kinds of flaws (e.g false dilemma, cause & effect, source attack etc.) they are when I see some questions. 1) Prep2, sec.4, #11 2) Prep1, sec.3, #12 3) Prep7, sec.1, #17 4) Prep12, sec.4, #15 5) Prep2, sec.2, #5 6) Prep9, sec.4, #5 (I'm not sure whether it's mistaken cause and ...