Pilot Incapacitation.
The original question. What will the F/O do if he gets no response to an 80 Kt and 100 Kt call when he is the PNF. Seems pretty darn simple to me, regardless of what the company SOP says regarding who can call for an ABORT. Any Company which dictates that only the Captain may command an ABORT and that he must conduct the ABORT, would surely do so on the assumption that the Captain is not incapacitated. What any F/O should be aware of is that his/her backside is as precious as any other on the aircraft and if he/she determines that the handling pilot has become incapacitated then he/she has no option but to assume command. That is why there are two pilots, each qualified to fly the aircraft. All the rest of the myriad of postings are academic. Obviously, if the handling pilot becomes incapacitated well below V1, as I would believe the original question indicates, the F/O should ABORT. If above V1, GO. Any pilot who thinks otherwise should think seriously about another career path.