Wilful ignorance

It is one thing when you are ignorant when you are ignorant because you never had the opportunity to know better. Someone who grew up with no education may not know how a jet plane or the Stock market works. This is no reflection on intelligence or personality. However, if someone has the information presented, but ignores it because it does not agree with preconceptions, demonstrates something clear about intelligence and personality. Few things are as difficult as preserving an open mind and curiosity.