There were three men stranded on a deserted island – a doctor, a lawyer, and an engineer. They were desperate to find a way off the island and back to civilization.
The doctor said, "I know what we can do! I'll gather some coconuts and we can use them as a flotation device to swim back to shore."
The lawyer scoffed at this idea and said, "No, no, no! What we need to do is build a giant SOS sign out of rocks on the beach. That way, a passing ship will see it and come to rescue us."
The engineer thought for a moment and then said, "Actually, I have a better idea. Let's just push the lawyer into the ocean and use him as a buoy. He's so full of hot air, he's bound to float!"