“…Recently, Wright, Poulin‐Dubois, and Kelley () have demonstrated that although 4‐year‐olds are very proficient at categorizing vehicles, furniture, and animals at the basic and superordinate levels, 5‐year‐olds have difficulty categorizing objects at the living–nonliving (animate–inanimate) level. Furthermore, preschoolers have persistent difficulty with the concept “alive.” When, for example, preschoolers are asked to categorize objects on the basis of being “alive,” they will systematically exclude plants (e.g., Anggoro, Waxman, & Medin, ; Brulé, Labrell, Magalakaki, Fouguet, & Caillies, ; Carey, ; Leddon, Waxman, & Medin, ; Meunier & Cordier, ; Opfer & Gelman, ; Opfer & Siegler, ; Richards & Siegler, ; Waxman, ). Even 1st year high school students rate animals as alive at much higher rates than plants (Yorek, Sahin, & Aydin, ).…”