Carter and his younger brother, Owen, are having lemonade. Carter had poured the lemonade into two identical glasses but one was cracked so he poured the lemonade from it into another taller glass. Because his brother protested, Carter found another glass like the first two. When he poured the lemonade from the tall glass into the identical glass, Owen started to cry. When Carter asked why, Owen said that it wasn't fair that Carter must have drunk the extra lemonade because now there was the same amount in each glass. Clearly, Owen:

Question

Quizplus · Accepted Answer

Owen lacks reversibility, which is the understanding that actions can be reversed, returning to the original state. He doesn't understand that the amount of lemonade remains the same despite being poured into different shaped glasses.

Carter and His Younger Brother, Owen, Are Having Lemonade