As a once retail vendor, it's not as simple as bad faith. But they happen to be very lazy, intellectualy lazy. Most of people lacks intellectual curiosity. The

As a once retail vendor, it's not as simple as bad faith. But they happen to be very lazy, intellectualy lazy. Most of people lacks intellectual curiosity. They don't want to go to through the processing of information discovery and intellectual maturation of that information in order to arrive to some sort of conclusion. They just want a final, direct answer to every question they ask to themself, when they ask them. They also don't question the information they are confronted to. They often take it at face value as long as it doesn't require them to think to much about it. That's why it so hard to make change their mind once they have accepted an answer to a question, even if that answer is obviously wrong.