[In Pictures] Shortlist for the Best Ghost Photograph at the Edinburgh International Science Festival

According to foreign media reports, the Edinburgh International Science Festival has opened recently. The following "ghost" photos were taken by amateur photographers and have made the shortlist for the "Best Ghostly Encounter" photography competition held at the Edinburgh International Science Festival. Are they really ghosts? Some people explained that it was actually the result of overexposure, but some people are firmly convinced about the existence of ghosts. Can you persuade them?