I am certain I must first do something with my mind before my arm moves as I desire.
There is no doubt.
It's just you believing and claiming there is no doubt. Shall we do an other round?
It is like saying I am certain I must stand before I can walk.
Oh, I understand your certainty. No need to explain by going into comparable certainties.
It is a clear understanding of the order of events based on many many experiences.
Yes, your certainty is indeed empirical. It is based on experience, as you say yourself. That's good. You're not entirely irrational.
Second, you justify your certainty as an inference from many repeated experiences. That's good since that's what we all do in the course of our lives and I hope we can't said to be all idiots.
Third, this shows your certainty has the same probability of being true as absolutely whatever anybody, including any complete idiot, come to believe about the real world on the sole basis of their own very, very, very limited experience of life. Not so very bad but not exactly anything to crow about as you've been doing here for so many years without any decency.
Fourth, this explains why you don't know the thing you say you know. You're certain of it like any idiot come to be certain of things. Things like for example that it is certain that it is the Sun which is turning around the Earth, and certainly not the Earth turning around the Sun.
And, of course, this is the kind of certainty which is best done by brains. That's what they do. They infer reasonable beliefs from the inevitably very limited experiences they can collect about life. It's all your brain that's makes you believe what you believe. It's your brain that making you believe you're moving an arm, an arm which doesn't even exist as such.
There is never the experience of the arm not moving as I command when I give the command.
There is never the experience of the arm moving as I desire without the command.
This just shows you're fortunate enough not to have experienced situations where arms and legs do things without your command. Or don't do what you command. These things can happen precisely because it's brains that are doing it and brains can suffer from any number of very interesting ailments. There's nothing so interesting to witness as your own brain expanding the range of your familiar experience of reality outside rationality. You'll get there, though, because we all do unless we're perhaps fortunate enough to die before. Wait for when you stop being able to dress yourself, to understand what you should do now, to recognise family, to remember your own children, to understand what people say. And I'll refrain from more picturesque and graphical things people can get to experience. Just wait.
So, as I said, you have a very, very, very limited experience of life. You should go out and talk to people and family a bit more.
All experience is the same.
Not mine. So what you say is just terminally wrong.
The command is given then the arm moves as desired.
Sure, the brain gives the command, you think you've done it, and it looks like what you desired, desire that's also produced by the brain. And when you're brain gets subject to senescence, things may start to look different.
No, we're not. We're not all moronic Popes. There's many Copernicuses out there, fortunately.
EB