所以，综上所述，如果斯内普是伏地魔的人，那他不警告邓布利多是没有危险的，那么他就应该不警告——但是，奇怪的是他警告了！那只能说明他不是伏地魔的人。^ ^
二、给福吉看他的黑魔标记：
原文：Snape strode forward, past Dumbledore, pulling up the left sleeve of his robes as he went. He stuck out his forearm and showed it to Fudge, who recoiled.
"There," said Snape harshly. "There. The Dark Mark. It is not as clear as it was an hour or so ago, when it burned black, but you can still see it. Every Death Eater had the sign burned into him by the Dark Lord. It was a means of distinguishing one another, and his means of summoning us to him. When he touched the Mark of any Death Eater, we were to Disapparate, and Apparate, instantly, at his side. This Mark has been growing clearer all year. Karkaroff s too. Why do you think Karkaroff fled tonight? We both felt the Mark burn. We both knew he had returned. Karkaroff fears the Dark Lord's vengeance. He betrayed too many of his fellow Death Eaters to be sure of a welcome back into the fold."
解释：
斯内普：无，因为贝拉没提到。
从这里可以发现，斯内普非常渴望福吉接受伏地魔归来的事实，甚至不惜在那么多人面前Show他的黑魔标记（要知道这并不是什么光荣的事）。那么为什么斯内普那么渴望福吉能面对现实呢？因为（这要与下一个论据联系起来），他极不想执行邓布利多的计划——回去做他的食死徒，给邓布利多当间谍。因为，监视伏地魔和玩命没什么区别，他随时都有可能被拆穿，随时都有可能收到一道绿光作礼物- -。何况，他还没有在伏地魔召唤的时候立刻幻影移形去见他的黑魔王大人，如果最后不得不执行邓布利多的计划，那他所冒的风险就不是成倍递增了。
所以，从他极不想进行邓布利多的计划，可以推断出他极不想回到黑魔王身边，那么，就算他在第四部之前一直都是个彻头彻尾的伏地魔的人，那，在这一刻之后，他也绝对不可能终于伏地魔了。
三、终于还是去见他的黑魔王大人了T_T
原文："Severus," said Dumbledore, turning to Snape, "you know what I must ask you to do. If you are ready . . . if you are prepared ..."
"I am," said Snape.
He looked slightly paler than usual, and his cold, black eyes glittered strangely.
"Then good luck," said Dumbledore, and he watched, with a trace of apprehension on his face, as Snape swept wordlessly after Sirius.
斯内普的解释："Think!" said Snape, impatient again. "Think! By waiting two hours, just two hours, I ensured that I could remain at Hogwarts as a spy! By allowing Dumbledore to think that I was only returning to the Dark Lord's side because I was ordered to, I have been able to pass information on Dumbledore and the Order of the Phoenix ever since! Consider, Bellatrix: The Dark Mark had been growing stronger for months. I knew he must be about to return, all the Death Eaters knew! I had plenty of time to think about what I wanted to do, to plan my next move, to escape like Karkaroff, didn't I?
首先，通过原文的前后文（这里没有贴出，太长了- -||||），可以看出，这是邓布利多作的最坏的打算。也就是说，只有在福吉坚决的不同意，万不得已的时候，这个计划才会被执行。而看看斯内普的解释，他是为了确保能够继续作为一个间谍才晚去了两个小时。从他这个解释看，他不但料事如神的知道福吉一定不会答应（只有福吉不答应，才会有邓布利多的命令降临到他的头上），而且似乎完全忘记了他曾经歇斯底里的逼福吉面对现实——也就是逼福吉打击伏地魔——如果这样他还是伏地魔的人的话，那他对忠诚的理解方式就有待研究了- -|||||||
