The dominant life form on Earth, the top of the food chain; capable of so much. Here are some more things that only a human being is capable of:
Selling bottled water by charging money for it.
Buying bottled water by paying money for it.
Looking at the label on the bottle after giving someone money for the water in the bottle and then going back to the person they bought it from and demand proof and evidence that the water in the bottle is actually wet, otherwise they deserve a refund.
Actually getting a refund because the vendor could not provide the requested proof.
Going next door and buying a bottle of water there instead, because the cashier has a kind face.