1st, he gave you three definitions, yes. All of them are the same definition. They are stages. He explained that; those three together are the definition of thought. That is what you're not getting.
Mr. Tanner, can you define a desire? Is the desire to reproduce a desire or a need? If it is a need, then you would have to argue that it is necessary for a given organism's survival (how you defined need above), while if it's a desire, you'd have to admit that all living organism have it and thus free-will is not unique to humans. If it is a need, how?
It can be both. To reproduce is an instinct in most animals, since the ones that don't have it died off. However, it can also be a desire; you want to have sex, you want to have children. It is entirely possible to not want children. So in most animals it is an instinct, but some individuals do not want it and can overpower that instinct with their own specific desire. As for free will not being unique to humans...I never said it was, did I? Humans are animals. I don't see a reason why animals can't have free will as well. To clarify further: You NEED to eat, but you WANT to eat bacon. There's no specific NEED to eat bacon, you consciously decided that you want bacon over, for example, a crumpet.
"And, Mr. Tanner, you still cannot explain how the brain makes a decision - what is that thing that chooses between two options? How does it make its decision? If it is a purely materialistic action, how does it introduce a new stimulus into the brain and how is it not just an effect from some earlier cause? You have to remember, I'm not saying "choice doesn't have a materialistic answer, therefore soul," I'm saying "Choice doesn't have a materialistic answer, therefore choice is an illusion generated by a complex process of cause and effect." The soul only comes in if we want to assert, despite what seems like evidence to the contrary, that choice and free will do exist."
I have explained it, as have many others, so that part I'm not going to bother repeating. I will say this: New stimuli are fed into the brain via the senses; sight, sound, touch, etc etc. Choice DOES have a materialistic answer. There are usually multiple possibilities one can pursue, so those are "choices." Whether or not one is more likely than the other doesn't change the fact that there are multiple possibilities. So that part of your assertion is flawed. And as I've detailed, Free Will and Choice has NOTHING to do with a soul, and if you want to assert that it does, you have to provide evidence, which you have failed to do thus far. But I will posit the same question I did earlier: Granting for a second that there is only the illusion of choice...what is the functional difference between choice and the illusion of choice? How would it affect our day to day lives? Answer: It wouldn't. So I don't see a need to slot something supernatural in there. You have yet to answer my questions on the nature of a soul, so I see no reason to accept your proposition that a soul is necessary for free will (which is, I think, utterly wrong).
"And, Mr. Tanner again, if you're going to start quoting the Apocalypse of John as a source for what Christians believe, you're probably going to run into trouble as most consider it a work of allegory and would consider it reckless to read it literally."
"But the cowardly, the unbelieving, the vile, the murderers, the sexually immoral, those who practice magic arts, the idolaters and all liars—they will be consigned to the fiery lake of burning sulfur. This is the second death." [Revelations 21:8]
What other way is there to interpret that, hm? And the bible itself specifically states - said by Jesus, no less - that the Scripture is not open to interpretation, thereby meaning that it should all be taken literally. And how do you go about deciding which bits are allegorical and which bits aren't? What system, what criteria do you use to decide which bits are literal and which aren't? I've read the bible, and there is no tag that says "This book is allegorical," so how do you decide which is literal and which one is metaphorical?
HOWEVER, I think we need to move this to PM's, since this is MASSIVELY off topic.