The entire evidentiary record for second sight is testimonial, collected by folklorists across three centuries of Highland tradition. No experimental or quasi-experimental protocol comparing a claimed seer's forewarnings to ordinary hit or miss chance has ever been devised, so there is no data from which any verdict could be drawn either way.
What would resolve this A prospective, blinded elicitation study: predictions attributed to second sight logged in advance, scored against subsequent events by an independent judge, and compared to a stated chance baseline.
OpenFolklore studies; parapsychology; statisticsRobert Kirk, The Secret Commonwealth of Elves, Fauns and Fairies