On a show last night someone was quoted as saying the Pill was only 49.9% more effective than nothing. The reasoning being everytime you have sex there is a 50-50 chance you will get pregnent. IF the pill is 99.9% effective thus it is only 49.9% more effective than nothing.
This strikes me as wrong but I exactly can’t say why. I guess the closest thing I can come up with is this is similar to someone saying “the sun will rise in the morning or it won’t, thus the chance of the sun not rising is 50%.” It seems wrong.
Was TV incorrect (alas no!!!)