Refusing Gun Sales

[youu_whoo_whoo]

Could a gun store refuse to sell to an individual if they showed no understanding of safe firearm handling? I can only try to imagine some of the outrageous things they have seen with people who just want to own a gun and have no knowledge of them. I understand that they have to learn somewhere, but is there some sort of firearms understanding and knowledge of its opperation that is necesary. I am just wondering about this situation.