Infield fly rule

[David Van Milligen]

An INF is determined by the situation not a call by the Umpire. IF both failed to call the INF it is still an INF. If it was called when the situation did not warrant a call, such as two outs or runners not on first and second, it is not an INF.
It is the responsibility of the players, and coaches, to know when the INF rules is in effect.
I am not saying you do not look bad and you can cause unnecessary confusion if you fail to call INF at the proper time, but it is not a necessary element.