Mind is the brain?

[bennyboy]

I think Rhythm and others would say "If it walks like a duck and quacks like a duck, it's a duck."

Seems to be enough for you too, when speaking to other human beings....

Yep. And even if I suspected something did not have a mind, like a cyborg, I would probably talk to it anyway if its behavior gave me a sufficient sense of social interaction. But that's a pragmatic assumption-- not a solid foundation for a philosophical position.

Now wait a minute, how could you know that it experiences like a duck even if it -is- a duck..don't your objections apply?

Yes, they still do. If ducks experience, then I can be sure a duck experiences-- by definition, not observation. But I cannot know if ducks experience, and cannot include that in a gnostic definition of duck-ness. You (and little_monkey) are quite right in that.