It can be real but unimportant. An extra drink every week might increase my liver cancer risk by 4%, but that's negligible if it's the difference between a 1 in

It can be real but unimportant. An extra drink every week might increase my liver cancer risk by 4%, but that's negligible if it's the difference between a 1 in 1 million chance and a 1 in 960,000 chance.