这个问题真是太有意思了，许多同人文的基础不就是哈利进了斯莱特林咩……

假如哈利进来斯莱特林，那么《哈利波特》这部书中哈利与斯内普教授的对手戏无疑就好玩了很多——当然这个前提是我们读者都知道斯内普与伊万斯小妹的前尘往事……

在描述这个设想以前，我要先纠正一下一些答案当中说，分院帽当初想把哈利分入斯莱特林是因为他像校长所说的：“足智多谋……意志坚强……还有某种对法律条规的藐视”——事实上我一向认为足智多谋这四个字的荣光属于赫敏，跟哈利绝对不搭边。至于“某种对法律条规的藐视”，这可不是斯莱特林的专利，从书中的描述来看倒是格兰芬多干的比较多一点——你看看 Marauders 连非法阿尼玛格斯都弄出来了——如果说斯莱特林善于玩弄法律倒还是比较正确的，比如卢修斯胁迫其他校董把邓布利多赶出学校（这与议会联手弹劾总统基本上是一个程序）就是一个绝好的例子。

哈利很显然不属于这种能玩转法律的心性，说不好听点没这智商——倒是赫敏，自打巨怪事件之后开了窍，属于这方面的好手（事实上根据 J.K. Rowling 的采访，后来赫敏去了执法部门工作：“where she was a progressive voice who ensured the eradication of oppressive, pro-pureblood laws.” 尽管这个工作听起来像是立法部门做的……）

所以如果一定要说这几项是分院帽强烈推荐哈利去斯莱特林的理由，我觉得它推荐赫敏更合适一点——分院帽之所以想把哈利分到斯莱特林去，是因为它发现了伏地魔的灵魂的属性。

这一点有 J.K. Rowling 的采访为证：

...Also, I always imagine that the Sorting Hat detected the presence of that piece of soul when Harry first tried it on, because it's strongly tempted to put him in Slytherin.So that's how I see it.
也就是说分院帽想把哈利分入斯莱特林的理由，是因为它检测到了「伏地魔的」一部分灵魂。再看看当初分院帽是怎么说的：

‘Hmm,’ said a small voice in his ear. ‘Difficult. Very difficult. Plenty of courage, I see. Not a bad mind, either. There’s talent, oh my goodness, yes – and a nice thirst to prove yourself, now that’s interesting ... So where shall I put you?’

Harry gripped the edges of the stool and thought, ‘Not Slytherin, not Slytherin.’

‘Not Slytherin, eh?’ said the small voice. ‘Are you sure? You could be great, you know, it’s all here in your head, and Slytherin will help you on the way to greatness, no doubt about that – no? Well, if you’re sure – better be GRYFFINDOR!’
在我们了解一切前尘往事之后再回头看分院帽的这段话，就非常有深意了。它一开始就说“Difficult”，又讲到“There's talent”（后面我们都知道了这说的是蛇佬腔），这无疑是哈利本身的属性和伏地魔那片小灵魂之间的冲突。所以分院帽纠结了——So where shall I put you?

我们都知道哈利选择不去斯莱特林。帽子遵从他的意愿，把他分去了格兰芬多——尽管帽子坚持哈利“如果在斯莱特林的话会做得很出色的”（见密室第十二章），但帽子同时也强调“you were particularly difficult to place.”——这再次说明帽子认为哈利能够在斯莱特林出色是因为伏地魔的灵魂碎片，而 difficult to place 的原因则是因为哈利原本的性格就适合格兰芬多，简单说哈利的状态给帽子的感觉就是——这娃精分了 - -b。

而 J.K. Rowling 在一次采访中表示帽子是从来不会出错的：

ES: Has the sorting hat ever been wrong?

JKR: No.

ES: Really?

JKR: Mm-mm. Do you have a theory?

ES: I have heard a lot of theories.

JKR: [laugh] I bet you have. No. [laugh] Sorry.
所以综上所述，在删除了伏地魔淘气小魂片的影响后，哈利就是应该去格兰芬多的。

但是这样官方逼死同人的节奏就太不可爱了。就假设哈利没来得及拒绝分院帽的妄想进了斯莱特林又会怎样？

首先要说说跟德拉科·马尔福的关系会不会好。

很多同人文都有这个“一秒钟变好基友”的设定，但是严肃的说，这个可能性是在是很小。原因很简单——三观不合。即便没有以前的冲突，马尔福也是个不折不扣的小坏蛋。非常遗憾地说，尽管我也很萌其演员 Tom Felton 的颜，但是 J.K. Rowling 不止一次对读者们强调，Tom 同学和书中的德拉科并不是同一个人。而书中的马尔福虽然不是不可救药的犯罪分子，但也绝对说不上讨人喜欢。来看几条 JKR 的评论：

JKR: It amuses me. It honestly amuses me. People have been waxing lyrical [in letters] about Draco Malfoy, and I think that's the only time when it stopped amusing me and started almost worrying me. I'm trying to clearly distinguish between Tom Felton, who is a good looking young boy, and Draco, who, whatever he looks like, is not a nice man.
再如这般辛辣讽刺：

Luisa: Is Draco an only child?
JK Rowling replies -> Yes. You wouldn't want more Dracos, would you?!
再如这般不幸中枪：

JKR: No! God, it wasn’t Pansy Parkinson! I loath that girl. I don’t love Draco but I really dislike her.
事实上马尔福一家都是不折不扣的种族主义者，可以想象他们对待麻瓜和麻瓜出身的巫师的态度，J.K. Rowling 被问及这些血统冲突是否是起初就设定好的，还是后来的突发奇想时这样说道：

That was deliberate, it was always there from the beginning as you saw with Draco – even from first book with Draco, Harry discovers him first being rude about Muggles.
马尔福一家人对于血统的观点将会是德拉科和哈利友情（如果会出现的话）中无法跨越的一个障碍，他们对于血统的认识 JKR 概括的也很明确：

To people like Lucius Malfoy, a Muggle-born is as bad as a Muggle, so Harry is considered Half-Blood because of his mother's parents. In effect, a Muggle Grandparent "pollutes" the blood.
而老马尔福之所以希望德拉科拉拢哈利，是因为老马尔福认为哈利波特是一个非常厉害黑巫师，因此他才能够在婴儿时期就打败黑魔王。他希望借助新兴的支持纯血立场的黑巫师领袖——哈利波特，让马尔福一家的地位在巫师界登上新的台阶。然而现实（哈利波特的三观和立场）给了他重重的打击，所以他在了解到这一点之后不再对哈利保有这方面的期望。这一点在POTTERMORE: a unique online Harry Potter experience from J.K. Rowling一章中有详细的描述——由于章节需要解锁，我就引用一部分关键性的原文：

Draco was raised in an atmosphere of regret that the Dark Lord has not succeed in taking command of the wizarding community... In childhood, Draco associated mainly with the pure-blood children of his father's ex-Death Eater cronies, and therefore arrived at Horgwarts with a small gang of friends already made, including Theodore Nott and Vincent Crabbe.

Like every other child of Harry Potter’s age, Draco heard stories of the Boy Who Lived through his youth. Many different theories had been in circulation for years as to How Harry survived what should have been a lethal attack, and one of the most persistent was that Harry himself was a great Dark wizard... and Draco's father, wily Lucius Malfoy, was one of those who subscribed most eagerly to the theory. It was comforting to think he, Lucius, might be in for a second chance of world domination, should this Potter boy prove to be another, and great, pure-blood champion... Harry's refusal of Draco's friendly overtures, and the fact that he had already formed allegiance to Ron Weasley, whose family is anathema to the Malfoys, turns Malfoy against him at once. Draco realised, correctly, that the wild hopes of the ex-Death Eaters --- that Harry Potter was another, and better, Voldemort --- are completely unfounded, and their mutual enmity is assured from that point.
而纳西莎·马尔福，尽管不是一个食死徒，但她的世界观跟她丈夫也是一致的——直到伏地魔试图搞死她儿子：

Abjoppotter: Is narcissa malfoy really a death eater?
J.K. Rowling:No, she never had the Dark Mark and was never a fully paid-up member. However, her views were identical to those of her husband until Voldemort planned the death of her son.
所以说基于德拉科以及马尔福家族对“大难不死的男孩”的期待以及价值观，即便德拉科和哈利在斯莱特林最初的日子能勉强维持基本的“友情”，这份情感想必不会长久。

然后我们再说说和斯内普教授的。

这可能是哈利同学进入斯莱特林唯一的福利……斯内普教授不能给哈利扣分了！！！当然斯内普教授的人生从此就充满了杯具……每天都能看到少年时代恨不得一巴掌拍到脖子里去的那张脸在眼前晃，而且最可恨的是这张脸的所有人现在还在自己的学院！！！不能扣分，估计也绝不想给这张脸关禁闭一晚上面面相觑……

当然他还是要保护波特同学的。也说不定慢慢就发展出了真感情（对灯发誓这句话我没有其他的意思）……

很多人说哈利可能会在穿越活板门的时候就发现斯内普教授实则是个好人，但我很怀疑没有了罗恩在旁边撺掇以及赫敏那颗机智的大脑，还会不会有穿越活板门这个事情发生——想想看吧，三人组经历了多少波折才搞清楚这一系列事件的？可能整个哈利波特的情节都要改变了。

在第一本书里，伏地魔指示奇洛做的最主要任务是拿到魔法石，他可能根本没想杀死哈利波特。事实上伏地魔一直都有奇葩的命定情节—— 一定要按照预言所说的，亲手弄死哈利波特。如果他是目标驱使型的精神病，哈利波特早就死了一遍又一遍了，哪还会活上 7 本书这么久……哈利在第一部书中完全就是乱入的，属于附带型福利。

更何况现在哈利还在斯内普教授眼皮子低下，就算斯内普捏着鼻子给他关一学期的禁闭，我想他也不会希望哈利涉险去对抗奇洛、保护魔法石神马的。

假如斯内普教授不是一开始就针对哈利，给少儿时代的哈利同学造成了极大的逆反心理，按照哈利很强的忍耐力 + 没有格兰芬多对斯内普既有恶感的影响，也许他对魔药学的兴趣能够维持正常的水平，也说不定继承自莉莉的魔药学天分能够逐渐在他身上展现。也许，有那么一丁点的可能，斯内普会被邓布利多说服，这孩子更像莉莉而不是詹姆。

也许第五年他学习大脑封闭术的时候能稍微轻松一点（但根据 JKR 的采访，大脑封闭术的好坏更多是跟性格有关，所以哈利在这方面没有马尔福有天分）。大脑封闭术 + 与斯内普教授关系的缓和 + 克里切或许不会骗斯莱特林的哈利，也许小天狼星就不会（冤）死……T—T

谢谢上传者的段段（关于隐形衣）

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