We need a new word to denote one who believes that for which there is overwhelming evidence and gives credence to that for which there is some evidence and gives no credence to that for which there is no evidence. Scientist might be used as a word to mean a believer in science. However, just as sexist has already been used for another purpose, so can’t be used to indicate one who believes in sex, scientist has already been used to indicate one who actually practices science for a living, so cannot be used to indicate a believer in the tremendous value of scientific evidence.
Atheist is actually a bad word for this because, as Dawkins points out in God Delusion, this defines one by their non-belief. I am an atheist. I am also an athorist and an azeusist and an aodinist and an abaalist, etc. For this reason, I prefer to call myself an antitheist. This works for me because I actually do believe religion is an evil institution and am opposed to all forms of theism. So, for me, this works.
However, we still do not have a good name for one who does not oppose theism, but simply does not believe in it. Skeptic is one word that could accurately describe such a philosophy, but is also overloaded with other meaning both connotations and denotations.
So, the question is, what should we call someone that believes that extraordinary claims, such as an invisible man in the sky, must be backed up by evidence in order to be given credence (other than unelectable for office at any level anywhere in this U.S.)?