Forgot to mention in my previous post we also use V1 as decision speed. Don't abort after V1 although also here one can be in the situation that it is the only possibility.
"What if..."
The FO calls stop, the Captain fails to see why (oil fluctuations??) and continues. Doesn't make that Captain necessarily popular for his decision. Maybe the FO called stop for another reason? Maybe by the time the FO explained why he called stop things get a bit late.
Aborting for an erroneous call from FO (or captain) below 80 kts isn't fatal. Above 80 kts both pilots can identify an engine fire/failure/jammed stabilizer. It is not that difficult.
Fortunately life isn't always black or white. There may be time for describing/challenging situations in plain language. ("Hee, is that a car on the RWY?") Captain is clearly the highest authority and responsible by law for everything & everybody. Also responsible for mistakes from others. If this responsibility is too much one wonders. They don't get their appreciated salaries for solving x-word puzzles in the newspapers, do they?