tarik123
And the answer is equally simple as I stated above.
There is a fundamental difference between "good-to-go minus one engine" and "committed to take off".
Strictly speaking V1 is the first one. However as the aircraft weight goes up or the runway length comes down the two parameters converge.
Yes, at 54000kg and 116Kt you may have the luxury of a second or three to decide whether your problem was really so bad that the aircraft wont fly and still stop with runway to spare. At 63000kg and 149kt you almost certainly would not.
It is the deadly grey area inbetween that has been exercising the contributors to this thread.