I think you misunderstood. In referring to "truth", I wasn't addressing the veracity of Watson's statements (which, however you come down on that, were objectively racist, in the sense of making judgments based on race). I was talking about his impropriety, the truth of which even TFA admits (even if it emphasizes his attempts to later "correct" the record). Watson used a colleague's work in a way that appears less than on-the-level. Watson misrepresented the events of the discovery in which he played a major part. That is what would lead a dispassionate observer, without bias, to reasonably question his statements, especially ones which we are expected to accept, in part, based on the strength of his record.
He was making a prediction of capability, based on attributes which he chose to couch in terms of race, and which have inconclusive applicability to the capability in question. Notably, those attributes are known to be affected by, as opposed to the cause of, the outcomes which that capability is supposed to effectuate.
Did reality also hand these "truths" to him? Or are they, too, "just opinions"?
> 2000: During a guest lecture at the University of California Berkeley, Watson shared his belief that thin people are unhappier than larger people, and therefore harder-working. He also said: “Whenever you interview fat people, you feel bad, because you know you’re not going to hire them,” according to the San Francisco Chronicle.
> In that same lecture, the Chronicle reported, Watson commented on the (nonexistent) link between sun exposure (and darker skin color) and sexual prowess: “That’s why you have Latin Lovers. You’ve never heard of an English lover. Only an English patient.”
> 2007: In an interview with Esquire, Watson said, “some anti-Semitism is justified.” He continued: “Just like some anti-Irish feeling is justified. If you can’t be criticized, that’s very dangerous.”
> In the same interview, he asked, “Why isn’t everyone as intelligent as Ashkenazi Jews?” and suggested that rich people should be paid to have children because “[i]f there is any correlation between success and genes, IQ will fall if the successful people don’t have children.”
> 2012: Of women in science, he said at the EuroScience Open Forum in Dublin, “I think having all these women around makes it more fun for the men but they’re probably less effective.”
If you’re referring to Watson’s 2007 claim that Africa is unlikely to succeed n part because of the inhabitants’ inferior intelligence, as the “truth” he is speaking to “power” perhaps it is you who are biased.
The problem is that all our empirical data back up his (quite mild) point of view, whether we like it or not. I don't like it and don't think he does either.
That's your own biased judgment. Others may perceive what happened as Watson speaking truth to power, and paying the price for it.