demonstrate why people sometimes disagree about what is obvious. Once one person has recognized the face, they may genuinely find it difficult to understand how someone else cannot see it. Their perception has already reorganized the relevant shapes into a meaningful object. The second viewer is still seeing those same elements primarily as pieces of the forest.
Giving a direct answer immediately can therefore produce an almost comical reaction. The viewer may go from seeing nothing unusual to wondering how the face was ever difficult to notice. This sudden sense
