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The dip stick tests are the weakest--they're designed not to give false negatives (saying you don't smoke when you really do) but they give a LOT of false positives (saying you smoke when you don't). People take advantage of this--they'll say they take a lot of ibuprofen and eat poppyseed rolls when they're really smoking weed and eating opium.

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15y ago

What else can I help you with?