system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do we know animals are not as self-conscious as humans?
gpt
Consciousness tests. 

Things like setting up a mirror and watching to see if the critter figures out that they're seeing themselves or if they think they're seeing another critter. There are plenty of others, but that one is basic and persuasive. 

And the answer is that several other species are self aware.