Prof. Nicholas Epley of the U. of Chicago says naming your boat, talking to your plants, or singing to your pet hamster is a sign of human intelligence.
Historically, anthropomorphizing [giving human qualities to objects and animals] has been treated as a sign of childishness or stupidity, but it’s actually a natural byproduct of the tendency that makes humans uniquely smart on this planet. . . .
This is just the byproduct of having an active, intelligent social cognition—of having a brain that is programmed to see and perceive minds.–Nicholas Epley in Quartz
Comment: Epley cut short the interview to text his cat.