Some paranormal websites and TV programmes mention evidence of the activity quite a bit, but how good is this evidence? In many cases , their evidence of spitit is essentially a picture of an orb, a photograph of some smoke a report of temperature drop.
Most of this "evidence" is questionable at best, showing a lack of controls when it was gathered, lack of annalysis and poor presentation.
Evidence can take many forms, but what is the differance between good evidence and poor evidence? What are we looking for in terms of evidence of paranormal activity?