A flathead could be used to turn a Phillips screw, but run the risk of stripping even when used correctly. I, for one, use Phillips screws more often than flathead, firstly because they're slightly cheaper, but mostly, they're the length I want and I find them first at Home Depot.
You can use a flat head in a Phillips screw. I agree. This word limit is annoying. The REAL debate should be if Bush did 9/11 because Jet Fuel can't melt steal beams. Ariana Grande is part of the Illuminati. Look up the youtube video. Say no to drugs. #3hunna