'No, my cabbage moths have already started laying eggs in them! Send the trolley into the river!' 'No, the sailing wolf will steal the boat to rescue them!'

"Boat Puzzle", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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'No, my cabbage moths have already started laying eggs in them! Send the trolley into the river!' 'No, the sailing wolf will steal the boat to rescue them!'