A pained look crossed Sam's face as he lowered his eyes to the ground. He shook his head. "It's true," he said quietly, looking back up at Dean. "I wish it wasn't, or that I'd been able to change it, but it is."
He felt a chill work it's way down his spine as Dean told him to drop the act. Sam's brow furrowed, his frustration coming to the surface. He reached out and grabbed Dean's arm again. "Dean, I'm not a clone. It's really me and I'm telling the truth."
He had no idea how he could prove it. "You've got to believe me."