Can you ever prove that something never happens? Sometimes. Pretty much.
I often like to say on this blog, and elsewhere, "Nothing is absolutely certain." That's why science, our best means of understanding reality, is never 100% certain about anything. That remaining bit of uncertainty, which could be as small as .0001%, or even less, allows for the possibility of error in any and all scientific theories. Which permits science to progress by replacing old flawed knowledge with new less-flawed knowledge. Since nothing is absolutely certain, obviously this applies to medical knowledge. Today I read a Reuters story in our local newspaper, "CDC site adopts anti-vaccine views." Here's a PDF file…
