Watch Pilley give Chaser some impressively complex commands -- combining three verbs with three nouns -- in the video below. She understands the verbs “nose,” “get” and “paw.” Her reward is playtime with “Blue,” a little ball she chases across the room. For a whole collection of Chaser videos, click here.
She learned common nouns that represented categories, such as “ball,” and she learned to infer the names of objects by their association with other objects.
Heck, that is Ogden's Basic English.
I am curious if any abstracts were taught.