How many engineers does it take to change a light bulb?

Q: How many engineers does it take to change a light bulb?

A1: None. They are all too busy trying to design the perfect light bulb.

A2: Only the one with the instruction manual.

A3: One. But she would insist that the way she did it was distinctive.

A4: Three. One to hold the ladder, one to hold the light bulb, and the third to interpret the Japanese text.

A5: Five. One to design a nuclear-powered light bulb that never needs changing, one to figure out how to power the rest of the USA using that nuked light bulb, two to install it, and one to write the computer program that controls the wall switch.

A6: None. "According to my calculations, the problem doesn't exist."