To look at us, to observe us, to interact with us, you'd never know that our heads were filled with sawdust (the Colonel's Secret Recipe of sawdust, of course, but still only sawdust) instead of living brains.
We respond to the world in the same ways that you do. But it's hard to tell, even for me, if we are really experiencing the world in the way you are. You with your brains. Do your brains give you access to a world that our sawdust doesn't allow us? I think I remember what the world used to be like; I think that it remains the same.
But that "think"...are we really thinking at all? Are we feeling? Are we noting the redness of red, the sweetness of brains, the brightness of the day?
Or are we just auto-responders, programmed-sawdust tricks, confusing, clever deceptions assembled by philosophers and mad scientists?
Whatever. I'll still say that I think that your brains taste amazing, even if you and I can never tell if I actually think at all.
And it's cold comfort to the cattle when my jaw clamps down that I may not really be thinking at all.