Earlier quoted context omitted.
The investor's argument is that Theranos lied . The investor believes Theranos fraudulently produced evidence that their product worked in order to fake the responses to the investor's due diligence. If that's true, and the investor can prove it, then that's not simply part of the typical risk of investing, that makes the investor the victim of a serious crime.
That's a dumb argument then. See, when you do due diligence you should assume that the company lies. That's why you go there in the first place, if you believe everything they tell you then you're going to get fleeced if they lie. Theranos did not comply with their duty to inform truthfully, but the investors did not comply with their duty to research. Asking the company is not research, the technology being complex…
Even doing due diligence, you rely on their information, expertise and record-keeping. Lying or misleading is unacceptable.
This whole story is messed up. I still detect a bit of apologism on these boards, even though it looks like fraud was committed. Assume everyone lies? Really? What sort of world are you doing business in?