A mind that takes in every scrap of garbage tossed at it, much like an open mouth takes in flies, mosquitoes, and other trash.
An open mind is not subject to the filters that an educated person uses to keep out the trash.
An educated person has a filter on his or her mind that keeps out garbage such as network TV shows, hip hop lyrics, and strident speeches by Quean Hillary Clinton.
Just as an intelligent biker keeps his mouth shut while he rides, an intelligent keeps his mind shut when idiotic ideas fill the air.
An open mind, kept open without discrimination, soon gets filled with bilge.
The liberal says, "just because an idea is unpopular, that doesn't mean it's not true." That's right liberal! And the converse is also true: Just because an idea is popular, that doesn't mean it's true.