Westphal, J. Acta Anal (2011) 26: 187. doi:10.1007/s12136-010-0102-0
Sorensen’s celebrated problem about the eclipse of Near and Far is given a solution in which what is seen is Far, silhouetted. Near cannot be seen, as it is in the shadow of Far. A silhouette is a shadow. The so–called “Yale Puzzle” is a linguistic confusion.