If he cannot answer you, then he is an ignorant man;
he is not the Enlightened One.

If he answers you falsely, then he is a scoundrel;
he is not the Enlightened One.

If he tells you truly where the next gas station is, then he has not transcended samsara;
he is still caught in the material cycle of driving and refuelling;
he is not the Enlightened One.