That kind of hypothesis is clearly outside the bounds of acceptable discourse. Take an example from a link I posted further down the page, "The Death of Free Speech at Harvard"[1]. A law student wrote the following in a private email:

"I absolutely do not rule out the possibility that African Americans are, on average, genetically predisposed to be less intelligent. I could also obviously be convinced that by controlling for the right variables, we would see that they are, in fact, as intelligent as white people under the same circumstances....

I also don't think that there are no cultural differences or that cultural differences are not likely the most important sources of disparate test scores.... I would just like some scientific data to disprove the genetic position, and it is often hard given difficult to quantify cultural aspects.....

In conclusion, I think it is bad science to disagree with a conclusion in your heart, and then try (unsuccessfully, so far at least) to find data that will confirm what you want to be true. Everyone wants someone to take 100 white infants and 100 African American ones and raise them in Disney utopia and prove once and for all that we are all equal on every dimension, or at least the really important ones like intelligence. I am merely not 100% convinced that this is the case.

Please don't pull a Larry Summers on me."

They did pull a Larry Summers on her. The message got forwarded to the Dean, who successfully re-educated her. Here is the statement that the student later put out:

"I am deeply sorry for the pain caused by my email. I never intended to cause any harm, and I am heartbroken and devastated by the harm that has ensued. I would give anything to take it back.

I emphatically do not believe that African Americans are genetically inferior in any way. I understand why my words expressing even a doubt in that regard were and are offensive.

I would be grateful to have an opportunity to share my thoughts and to apologize to you in person.

Even beforehand, I want to extend an apology to you and to anyone else who has been hurt by my actions."

The Dean's statement is a masterpiece of double-think (emphasis mine):

"I am writing this morning to address an email message in which one of our students suggested that black people are genetically inferior to white people.

This sad and unfortunate incident prompts both reflection and reassertion of important community principles and ideals. We seek to encourage freedom of expression, but freedom of speech should be accompanied by responsibility. This is a community dedicated to intellectual pursuit and social justice. The circulation of one student's comment does not reflect the views of the school or the overwhelming majority of the members of this community.

As news of the email emerged yesterday, I met with the leaders of our Black Law Students Association to discuss how to address the hurt that this has brought to this community.... A troubling event and its reverberations can offer an opportunity to increase awareness, and to foster dialogue and understanding. The BLSA leadership brought this view to our meeting yesterday, and I share their wish to turn this moment into one that helps us make progress in a community dedicated to fairness and justice.

Here at Harvard Law School, we are committed to preventing degradation of any individual or group, including race-based insensitivity or hostility. The particular comment in question unfortunately resonates with old and hurtful misconceptions. As an educational institution, we are especially dedicated to exposing to the light of inquiry false views about individuals or groups.

I am heartened to see the apology written by the student who authored the email, and to see her acknowledgment of the offense and hurt that the comment engendered...."

[1] http://www.mindingthecampus.com/originals/2013/11/the_slow_d...