What do you consider "scientific" about paranormal field investigations? Or, what makes a field investigation scientifically valid? 

 I think we should look at what a science actually is. According to Webster's New Collegiate Dictionary, the definition of science is "knowledge attained through study or practice," or "knowledge covering general truths of the operation of general laws, esp. as obtained and tested through scientific method concerned with the physical world." What does that really mean? Science refers to a system of obtaining knowledge. This system uses observation and experimentation to describe and explain natural phenomena. The term science also refers to the organized body of knowledge, people have gained using that system. Less formally, the word science often explains any methodical field of study or the knowledge gained from it. This is exactly what we do as investigators, isn't it? We set out to observe a phenomena and through experimentation we try to get a better understanding of this phenomena. We collect information and test new ideas while possibly disproving other ideas. Now if that is not a science then I don't know what is.-Tracy