Assertion: vase | /r/Synonym | the rubin face
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Rubin's vase (sometimes known as the Rubin face or the figure–ground vase) is a famous set of ambiguous or bi-stable (i.e., reversing) two-dimensional forms developed around 1915 by the Danish psychologist Edgar Rubin.[citation needed]