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by t0mas88 710 days ago
They may be thinking about CS 25.109 in EASA? It specifies how the accelerate stop distance is calculated. That calculation assumes: "the pilot takes the first action to reject the take-off at the V1" so there is no 2 seconds to decide later. However it does add a distance equal to 2 seconds at V1 speed to the total.

That's a safety margin in the calculation, because you still need to move the thrustlevers and in some cases manually hit the brakes. Can't do that in a millisecond.