>to make sure the lowest common denominator comprehends what they're reading So are you saying that prior to the last 10-15 years, "lowest common denominator"

>to make sure the lowest common denominator comprehends what they're reading So are you saying that prior to the last 10-15 years, "lowest common denominator" people didn't understand anything about when a low pressure system developed quite rapidly around them, changing the local weather drastically -- because there was no easy-to-understand name for it?