If you are a *****, you may not know it, so the poll results won't be accurate.
If you are smart enough to know you are a *****, are you still a *****?
Here's the definition. Are you one of these?
noun
1.
Informal. a person who is notably stupid or lacking in good judgment.
2.
Psychology . (no longer in technical use; considered offensive) a person of borderline intelligence in a former and discarded classification of mental retardation, having an intelligence quotient of 50 to 69.