√70以上 two faces in one picture meaning 142912-Two faces in one picture meaning
Rubin's vase (sometimes known as the Rubin face or the figure–ground vase) is a famous set of ambiguous or bistable (ie, reversing) twodimensional forms developed around 1915 by the Danish psychologist Edgar Rubin Another example of a bistable figure Rubin included in his Danishlanguage, twovolume book was the Maltese cross Rubin presented in his doctoral
