You make the call: INT by BR on a potential IFF

[Altor]

If your logic is that the ball is not fair until the criteria of 2-20 are met, then your logic must also be that a ball is not foul until the criteria of 2-25 are met.

So, after reading 8-5-1, you must allow runners to keep any bases they reach during a high foul ball. Or a little spinner down the line where the runners have all advanced at least one base before the ball crossed the line from fair to foul before being picked up? That was the last base they legally occupied when the ball became foul, right?