Hindsight, uncertainty, assumptions
One aspect of the industry's safety plans is that pilots will act as they perceive the situation; thus 'improper use' (brakes) should not be considered in a safety argument. (SOP stop is STOP)
'False fire-warning, etc, can only be determined after the event; during takeoff any warning or alert must be acted on as true. Similarly unreliable speed; all that might be determined at the time is a difference - thus procedure, guidance.
'A shade beyond …' this is also unknowable at the time of the event, because the speed is 'unreliable'; a shade nearer to V1.
Recognise, accept, that there is uncertainty in all operations, outmanoeuvre this where possible - SOPs, but do not attempt to apply certainty before the event (assumptions in this discussion) as this might bias judgement in 'real' events.