Another name for an indifference curve is:
budget constraint. demand curve. isoutility curve. production-possibilities frontier.
When Jane is asked to choose between a pretty rock and a scissors, she picks the rock. When she is asked to choose between the scissors and a ream of paper, she picks the scissors. If Jane has consistent preferences, what will she pick if she is asked to choose between the pretty rock and the ream of paper?
She will choose the rock. She will choose the paper. She will be indifferent between them. We cannot tell; it could be either.