Don't judge me too harshly for putting this as a comment to an unrelated post. Reading this immediately made me think of you and your consistent appeal to rational thought and logic. The post is about the ideas of rational ignorance and rational irrationality, the post relates the ideas to veganism, that aside, you should at least be interested in the ideas and the related information and links there.

http://unpopularveganessays.blogspot.com/2009/03/rational-ignorance-and-rational.html

Maybe you've already encountered these concepts...