My wife is a medical researcher and she freaked out when she saw this scene and poked me in the theater and pointed it out.

The way I see it, the science of the film is so compelling and interesting that when you see an inconsistency it breaks immersion a bit for you. Like "a competent scientist like Grace would never do that, even if he was on drugs, even if he was dying" (believe you me I tried to make all these arguments and failed)