What If We Couldn’t Classify Objects?
If you weren’t able to group objects into classes, you wouldn’t realize that a blue metallic pot and
a green ceramic pot belong to the same group but that a blue metallic pot and a blue metallic car
do not. (Oliver Sacks has an interesting book on the subject, called The Man Who Mistook His Wife
for a Hat. He speaks of one of his patients who, unable to classify objects, wrongly concluded that
his wife was a hat and tried to put her on his head as he was leaving the office.)