"Before 80 kts we abort for any malfunction,
after 80 kts cancel master caution.
Between 80 kts and V1 we abort for severe malfunction, fire, failure or incapacitation."
That would be a part of my emergency briefing.
So basically,
Before V1 = stop
At or after V1 = go
V1 is also normally reffered to as take-off decision speed.