Six brilliant doubts

Six Brilliant Doubts..

1. If all the nations in the world are in debt, where did all the money go ???

2. When dog food is new and improved tasty, whe tastes it ??

3. If the "black box" flight recorder is never damaged during a plane crash, why isn't the whole airplane made out of that stuff ??

4. Who copyrighted the copyright symbol ??

5.Can you cry under water ??

6. Why do people say "you have been working like a dog" when dogs just sit around all day ??

Think..............