First we were told that we should avoid food that is high in cholesterol; then we were told that such food doesn’t get into the blood so it doesn’t matter. We were told to avoid eating fat; now we are told that fat can be good for us. Sometimes coffee has been described as harmful and sometimes as helpful. Drinking alcohol used to be considered unhealthy; now we are told it’s good for the heart.
But there has always been an eternal healthcare verity: Be sure to floss.
Now that maxim too is under assault: Researchers are now saying that there is little to no evidence that flossing actually works.
Read the story excerpted and linked to after the jump, and then consider what I say afterwards, how this may reflect a bigger intellectual issue: the difference between valid deductive reasoning and empirical proof. [Read more…]