It is the purpose of the State only to appoint honest policemen. However, this has never been achieved completely, for the good reason that it is impossible to weed out dishonest applicants with 100% accuracy. However, this is no good reason to abandon all checks on new recruits, nor to allow in the children of honest recruits without checks(!) but rather the authorities will make the best checks they can, and if a policeman shows himself to be dishonest at any time, he is fired double-quick.
First, once again, as with your marathon runner, you have fallen into a faulty illustration of Baptism. You are making the meaning of Baptism depend upon the recipient (the policeman), rather than the sovereign declaration of God to save all those that believe.

Second, your illustration proves the opposite of what your formerly were asserting, “Baptism is an outward sign of an <span style="background-color:#FFFF00">inward reality</span>,” for there was NEVER any <span style="background-color:#FFFF00">inward reality</span>! Thus, you have disproven your own definition of Baptism.

P.S. The illustration of the marathon runner is very poor IMHO as it shows someone running (Rom 9:16) to obtain salvation and winning the Gold Medal of Baptism. This is an Arminian gospel, which is no Gospel at all.

Reformed and Always Reforming,