The panel says, "Note: Some new readers of this strip may be confused by the presence of a character who looks very much like a potato. The following comparison should clear things up:" A caption pointing to a drawing of Dilbert the Frog says, "Dilbert (turned into a frog and disguised as Prince Charles)." A caption points to a potato. The panel says, "A handy rule for telling which one is a potato is to look for the presence of glasses. Although potatoes do have eyes, they are know to be vain and generally prefer contact lenses. Keep this reference guide with you."