[UmpTTS43]

Originally Posted by Rich Ives

You're kidding - right? Read these:

The 2.00 definition of Foul Ball which you posted above.

5.09 The ball becomes dead and runners advance one base, or return to their bases, without liability to be put out, when—
(e) A foul ball is not caught, in which case runners return to their bases. This is necessary because "caught" is the other possible outcome

6.05 A batter is out when—
(a) His fair or foul fly ball (other than a foul tip) is legally caught by a fielder;

Rule 6.05(a) Comment: A fielder may reach into, but not step into, a dugout to make a catch, and if he holds the ball, the catch shall be allowed. A fielder, in order to make a catch on a foul ball nearing a dugout or other out-of-play area (such as the stands), must have one or both feet on or over the playing surface (including the lip of the dugout) and neither foot on the ground inside the dugout or in any other out-of-play area. Ball is in play, unless the fielder, after making a legal catch, falls into a dugout or other out-of-play area, in which case the ball is dead.


7.08 Any runner is out when—
(d) He fails to retouch his base after a fair or foul ball is legally caught before he, or his base, is tagged by a fielder.

10.08 SACRIFICES
The official scorer shall:
(d) Score a sacrifice fly when, before two are out, the batter hits a ball in flight handled by an outfielder or an infielder running in the outfield in fair or foul territory that
(1) is caught, and a runner scores after the catch, or
(2) is dropped, and a runner scores, if in the scorer’s judgment the runner could have scored after the catch had the fly been caught.

Rich is correct. This is why you point fair or foul on a caught fly ball near the line. You are signaling either a fair fly out or foul fly out.