You're not speaking of a behavior but of a "thing." Your consciousness sits idly inside your body, feeling as thought it's the driving all actions of its free will. There's no necessity, reason, or logical explanation for this thing to exist, let alone why or where it comes from.
No matter how many instructions you might use to create the most compelling simulation of a dragon in a video game, neither that dragon or any part of it is going to poof into existence. I'm sure this is something everybody would agree with. Yet with consciousness you want to claim 'well except its consciousness, yeah that'll poof into existence.' The assumption of physicalism ends up requiring people to make statements that they themselves would certainly call absurd if not for the fact that they are forced to make such statements because of said assumption!
And what is the justification for said assumption? There is none! As mentioned already quantum entanglement is posing major issues for physicalism, and I suspect we're really only just beginning to delve into the bizarro nature of our universe. So people embrace physicalism purely on faith.
>There's no necessity, reason, or logical explanation for this thing
I mean, I disagree. It's a internal virtual 'playground' you can bounce ideas off of and reason against. Obviously it imparts some survival benefits to creatures that have one at this point in evolution.
This gets to the issue. What is bouncing ideas off of yourself and reasoning against such? Well it's nothing particularly complex. A conditional is its most fundamental incarnation - add some variables and weights and you have just what you described in a few lines of code. Of course you don't think this poofs a consciousness into existence.
For consciousness to be emergent at some point there has to be wild hand-waving of 'well you see, it just needs to be more complex.' But any program is fundamentally nothing more than a simple set of instructions, so it all comes down to this issue. And if I hit a breakpoint and pause, and then start stepping through the assembly - ADD, MUL, CMP. Is the consciousness still imagining itself doing those things? Or does it just somehow disappear when I start stepping through instructions?
For even the most complex visual or behavior, you can stair step, quite rapidly, down to a very simple set of instructions. And no where in these steps is there any logical room for a consciousness to just suddenly appear.
No matter how many instructions you might use to create the most compelling simulation of a dragon in a video game, neither that dragon or any part of it is going to poof into existence. I'm sure this is something everybody would agree with. Yet with consciousness you want to claim 'well except its consciousness, yeah that'll poof into existence.' The assumption of physicalism ends up requiring people to make statements that they themselves would certainly call absurd if not for the fact that they are forced to make such statements because of said assumption!
And what is the justification for said assumption? There is none! As mentioned already quantum entanglement is posing major issues for physicalism, and I suspect we're really only just beginning to delve into the bizarro nature of our universe. So people embrace physicalism purely on faith.