Assertion: ghost | /r/CapableOf | offer proof
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Source sentences:
text: Benjamin Radford from the Committee for Skeptical Inquiry and author of the 2017 book Investigating Ghosts: The Scientific Search for Spirits writes that "ghost hunting is the world's most popular paranormal pursuit" yet, to date ghost hunters can't agree on what a ghost is, or offer proof that they exist "it's all speculation and guesswork".