My "complete non-discriminator" comment was stated to mean that you cannot look at an individual's intelligence and tendency to indulge in rational thought to predict whether they will be a believer or not.

I am specifically not saying that, "absent personal direct revelation from God himself, there's simply no amount of evidence that would cause rational persons to believe" On the contrary:

As far as I know, none of the people pictured in that post ever had any direct revelation from God themselves. But they all spent a LOT of time studying the writings of others who did claim to have had such revelation.

Based on their rational analysis of the credibility of those who had such revelations, they all became believers and devoted much of their lives to further study of those revelations as being the best use of their mental gifts.