Unnatural Organic Products?

His Argument Will Lose Him Ground 

GROCERY STORE | BEAVERTON, OR, USA |
Customer: “Excuse me.”
Me: “Can I help you?”
Customer: “I don’t understand what this sign says.”
(The customer points to a sign above the organic section. It indicates that all produce needs to be washed thoroughly.)Me: “It means that before you eat any product, you should wash it.”
Customer: “Why?”
Me: “Because there might be dirt or other things on the item.”
Customer: “But these are organic!”
Me: “Organic means they were grown only with natural substances.”
Customer: “Dirt isn’t natural!”

I'm reminded of a story Isaac Asimov told. He was visiting a friend who showed him his garden. The friend picked a potato and tossed it to Asimov. "What do I do with this?" he wondered. "You eat it," came the reply. "But it came out of the dirt!" Now, because he was Asimov and was known as a witty fellow, they all took it as a great joke, but he confesses that he was temporarily befuddled at the thought of eating something that had just spent all that time in the dirt. Let's hear it for hydroponics?