don’t call it a comeback.”Wikipedia’s strong internet presence for two decades is hard to dismiss. Yet, many people choose to keep the fact that they use it a secret.And it may have something to do with the fact that you were probably told it was unreliable, and that you should never, ever, cite it in your research papers.“It’s instantly available, and that’s very seductive,” said Carol Arcus, a director with the Association for Media Literacy.