One of the great things about the Internet is the way people post reviews on just about anything you are considering trying, whether it is a movie, a new restaurant or the local florist. This also introduces one of the worst things about the Internet: trying to figure out which reviews to trust. Was that effusive praise written surreptitiously by the merchant? Was that anonymous online slam posted by a devious competitor? The dilemma might be unavoidable in this age of abundant user-generated content, when we have to be smarter about separating signals from noise. But a startup called RatePoint Inc. begs to differ. It wants to play referee, giving consumers more clarity into a business’ reputation and protecting the business from unwarranted blights on its credibility.