Let's say one of the more competitive distance conferences where the mile is likely to go tactical. For instance, If a heat goes out at 4:20 pace, how fast would someone need to close the last 300 in to make it to finals. Or for other paces, 4:30, 4:15, 4:10. Is it pretty much a guarantee that a competitor would need to close the last 300 in around 43/42/41/40 to make it on to finals?