How would you behave as an equal opportunity God?

[iversonian]

Only people who believe in you will be saved. You want to reveal information about yourself in a way such that the rate of conversion of smart and dumb people are equal. Smart people will not be able to deduce, using their superior intellect, that what is being proclaimed about you is the truth. To put it another way, put 1000 smart people and 1000 average people in a room together with a David Sklansky type (who knows the truth) lecturing them, and you'll get the same rate of conversion. How would you go about achieving this?

My point in asking is: we go about trying to figure out using logic what the truth is, but what if God thought that wasn't fair to those people who lost out on the IQ lotto and devised some wily yet fair way to counteract this?