"I do know that sometimes knives aren't always the right solution," he says dryly. "Someone was asking too many questions." He shrugs. "It was easier to poison him and have it look like an accident than stabbing him would have been."
"Wait," his hand grips Severus' wrist. "If you're right about that," he nods at the patch of sand, "then that means there's a place where we won, doesn't it?" His face flushes. "Where Lord Voldemort was victorious?"
Mentioning trousers would have confuddled him completely. :D