I still think about a question that used to be on customs forms when entering the United States: "Did you come into contact with any soil while abroad?" My tho

I still think about a question that used to be on customs forms when entering the United States: "Did you come into contact with any soil while abroad?" My thought is always, well, the planet I visited is called Earth and is made out of earth, so it's more than likely that I came into contact with soil. I answer "no" anyway, because I feel you're not supposed to answer "yes" to that question, but I couldn't actually justify my answer with a straight face. So far, not in prison! Keeping my fingers crossed though.