Buy 200 bottles of cough mixture, the 500ml size.
Reprint 100 to say Pure Evil, the other 100 to say Pure Goodness.
Put them back on the shelves and see which one sells the most.
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From @simianamber
Buy 200 bottles of cough mixture, the 500ml size.
Reprint 100 to say Pure Evil, the other 100 to say Pure Goodness.
Put them back on the shelves and see which one sells the most.