The belief in the paranormal has, I think, a certain attraction that would take the heart of any person; the most jaded atheist can find him- or herself praying fervently if they find themselves in a foxhole with enemy mortars raining down around them, and the most skeptical rationalist will find his or her heart-rate elevated, should they find themselves in a spooky surrounding, such as a creaky old attic that a rickety old woman has told them is haunted, or in an abandoned house or something to that effect in the middle of nowhere.
The trick is not to bravado it out by creating a false shield of security, blindly ignoring what your instincts (misguided though they may or may not be) are telling you, for bracing your hands on your hips and loudly proclaiming "there are no such thing as ghosts!" has as much scientific credibility as brandishing a crucifix and bellowing "The power of Christ compels you to leave this place, spirit!"
Instead, put it to the test. A good, thorough RIGOROUS scientific test, where no foregone conclusion has been established for which you are attempting to gain support, but a proper, genuine trial of "is this real, or not."
Remember, there is no such thing as magic. There is superstition, and then there are fields of science which are not yet properly theorized. Put dowsers to the test. Compare the results to the predicted outcome of random chance. Actually put random chance to the same test. If the water in an area is so evenly distributed as for any given drilling to hit a water table eventually, then a dowser is likely to be right entirely by accident. Eliminate the variables; are you sure this dowser isn't actually a hydrogeologist and using the dowsing as showmanship and flimflam? What are the odds of any randomly-chosen location in the area having water in them? Could subsurface effects of the water somehow be causing the dowser to locate the water's high point through subconscious cues?
Any thoroughly-analyzed form of "magic" is either debunked as bogus, or becomes a new branch of science; or at the least, is revealed to have a perfectly understandable natural origin.