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The Hollywood icon has discussed his unconventional parenting techniques in a new interview with People magazine. Arnold revealed that he behaved like a “drill instructor” as he recalled incidents involving his daughter Katherine, 33, and son Patrick, 30. "Katherine comes over with Lyla,” Arnold recalled of the time his daughter came to visit with her three-year-old daughter Lyla. “And she says, 'Lyla, I told you already not to put the shoes there. Keep your shoes on, or you put them away, but you don't leave them there by the stand in front of the fireplace because you know what Daddy did?...