We need a new signal for IF!

[Rich]

You have other things to watch for? Sure, you do.

But you still need to know if there's IF -- that's a wing's call, nobody else's. You're counting backs regardless of how the rule's written.

(1) Fewer than 7 on the line? Now you need to know how many are on the field.

(2) 5 in the backfield? Now you don't need to worry about the number of A players on the field. Your job's actually easier!