Yes. And how consciousness is distinct from intelligence. You can test if someone is intelligent, but can never know if something is conscious.

I guess the signs of consciousness could be

• playing games. Bees play games.
• curiosity about things that aren’t important to any practical task
• making art
• signs of boredom or depression or joy. Goats mourn their dead.

But it must be easy to make an intelligent machine that convincingly mimics consciousness.