Non-Graphic Collections as seen with Arbitrary Objects
Inhelder, Brbel & Piaget, Jean · 2013
Mon (5; 3) starts with all the furniture. “Will you put anything else with them?—No.—Go on.—(He puts people, babies and a monkey together, and then makes a third collection of pots and pans.)—What about these (the monkey and the men), do they go together?—Yes, it&s;s a joke.—What if you weren’t joking?—Then it goes with the animals.”