Let me answer your question part by part:

1. Yes! I do believe in Clairvoyant Powers and believe that there are some people that possess such powers. There have been numerous such instances.

2. Dreams or feelings, whatever they are, are born in our brain. They are thoughts which are based on our past experiences, present trends, future assumptions, fears, joys, doubts, hobbies, likes, dislikes and our mindsets. Now, clairvoyant powers have nothing magical or supernatural in them. You might have heard people who have a rational or logical way of thinking often say that every happening has a cause (even accidents) and can be explained with a reason. Similarly, clairvoyance can be explained. It is a forecasting that is made by our subconscious mind. This again is an advanced form of perception or presumption. This comes from experience and can be sharpened with practice. Our subconscious mind works out possible future, based on our past, present life, interests, hobbies etc.

3. Dreams or thoughts that come true are not always the proofs of clairvoyance. Almost everybody experiences such coming true of dreams or thoughts at least once in life, but that is not clairvoyance.

Hope that was up to your expectations. Thanks