My interpretation of the GP's use of 'unique' here isn't specific necessarily to humans, just to conscious beings. Still, if you take the set H of properties o

My interpretation of the GP's use of 'unique' here isn't specific necessarily to humans, just to conscious beings. Still, if you take the set H of properties of humans and the set B of the properties of all other Earth creatures, you'll find that H is a proper subset of B. What makes humans 'unique' in the regard you mean isn't kind, but scale and combination.