Well, rather than discuss the temperature of hot coffee, let's return to something resembling a Scuba Related Court Case....
In Skiles v Lamartek, case hinged on a question was there a reasonable possibility (i.e. > 50% certainty) of a design defect in O2ptima that led to his death. After having six years to research, test, expose and document such a defect... shortly before the trial the plaintiff purchased the services of diving expert Dr Alex Deas. After sinking an unmanned O2ptima in a swimming pool and taking a few pictures of it with a cell phone in a baggie (no I'm not joking), Dr Deas was able to declare that the problem was what was described as "sticky water" which "froze" three cells for approximately ten minutes. The sticky water later completely and inexplicably disappeared leaving behind no trace in the sealed head, on or near the sensors which were nearly twice as old as the manufacturer recommends (again, I'm not joking).
I return you to your debate of "frivolous"...