 PLOT: Gabe claims that he didnt know anyone else but Rosemary on  his first day of Karate class. But later when he gets partnered with  David Betanahu he comments on how David has had a mustache since  nursery school. And the photo shown of young David is the exact same  class photo that included young Gabe and young Rosemary. Since you  can spot David among the others in the first day of karate class, it  cant be argued that David joined later.