It is interesting to note the difference in the binding verbal call rule #39A and the non-verbal undercall rule #39B. Because Player F said "call" the binding call rule #39A governs. However, had Player F simply pushed out chips equal to the amount of Player A's opening bet, then this becomes an undercall situation where rule #39B explicitly allows the TD's discretion to be applied. Let's say Player A opened for 500, Player B called, and Player C raised to 50,000 while Player D & E fold. Now if Player F doesn't use the word "call", but instead says "500" or throws in the 500, he may be more likely to be saved by the TD.
I would imagine that, under the circumstances, some TD's would save Player F in both scenarios. We can also assume that some TD's would require Player F to make the full call in both scenarios. And, of course, there will be some TD's that bind Player F to the full call only if he actually said "call" but to allow him to forfeit the undercall amount and fold only if he didn't make a general verbal declaration of call.
As a player, it might seem that, when it comes to calling, keeping silent and let your chips do the talking could be safest. As a TD, it might seem that, when it comes to using discretion, general verbal declarations are to be treated as more binding than amounts declared verbally or chips pushed to the pot.