The purpose of this discussion is to contrast theories, evidence, beliefs, and biases. Prepare and post a response to the following questions. Using concepts from the assigned readings, define what a theory is. Describe how you can know if a theory is valid. Offer one example of how a personal belief may differ from a theory. Note: Do not use the same example that one of your classmates has used in a previous post. Your initial post should be at least 250 words in length. Support your claims with examples from the required resources and/or other scholarly sources, and properly cite any references. Respond to at least two of your classmates’ posts by Day 7.