Never trust a man who uses a slotted screwdriver on a combination drive screw.
@MostlyHarmless Unless the only tool you have on hand is a butter knife. #necessity

@MostlyHarmless Uhhhh....I had to look 'em both up.

A slotted screwdriver is a flathead screwdriver, a combination drive screw is fitted with a SLOT specifically designed to allow the use of a flat head as well as a phillips or other drive.
Why should I think that you are only MOSTLY harmless?