batter inferference

[scyguy]

question on FED test "If a batter interferes with the catcher's attempt to throw out a runner stealing second base on a third strike, the UIC SHALL automatically declare two out -- the batter for striking out and the runner for the batter's interference".

Rule 7-3-5 penalty states that if the pitch is a third strike and in the umpire's judgment interference prevents a possible double play (additional outs), two MAY be ruled out.

Question says shall, rule book says may. Does this make the question false?

It seems to me that shall means you would always do it. If catcher had no chance at throwing out runner, I would think you would declare the batter out (assuming less than two outs) and return the runner to first.

Thoughts??