simple, use your best Judgement.
about 30 years ago I was getting a type rating in certain turboprop. had lots of sim training but also was getting some actual time in the plane.
I had a (what I consider) a goofball for an instructor.
He asked me to do a takeoff...(it was at night) and at 80 knots he reached up and pressed to test the annuciator panel, illuminating ALL the annuciators (warnings, tell tales, wwhatever you call them in your world).
I continued the takeoff, climbed to a safe altitude and he said go back and land as soon as you can
so I did.
he said: you should have rejected the takeoff.
I said: why?
he said: you reject for any warning before V1
I said: not if it is obviously caused by a moron pressing the press to test.
I got my type rating just fine...and complained to high heaven about this goof...he was soon fired for this and other odd things in his world of training.
USE YOUR BEST JUDGEMENT
is the copilot not making the 80 knot call because he is slumped over and dying...or is he eating a hamburger and has his mouth full of food
next time tell him not to eat during takeoffs, or get him help.