Does this mean that the more you know about religions the less you believe?
I think "Nothing in particular" is the pc way of saying "apathetic, but I know I'm supposed to believe in God I just can't believe based on what I've been told; and I'm just not smart enough to be Agonistic".
*data and chart image is from http://pewforum.org/Other-Beliefs-and-Practices/U-S-Religon-Knowledge-Survey.aspx