Causal determinism is defined as conditions at time t and how things go ever after are fixed by natural law.
Yes, but keep in mind that "fixed by natural law" is a metaphor for reliable causation. Each object is acting according to its nature. The bowling ball placed on a slope will always roll downhill due to gravity. However, the squirrel may go uphill, downhill, or any other direction, governed by its biological drives more than by gravity. And it is the nature of intelligent species to choose when where and how they will go about satisfying their biological drives.
So, there are no law books telling these objects what they can and cannot do. Whether inanimate, living, or intelligent, they each are simply acting according to the nature of their construction.
Adding 'reliable' is suggestive of something that can be used to our advantage, a reliable car, a reliable employee....
Oh! That is what you meant by "advantage". Yes, a reliable car, one that starts when you turn the key, is definitely an advantage over a car that only starts sometimes when you turn the key. If the car is reliable, then we can predict what will happen when we turn the key. If the car is unreliable, then we cannot predict what will happen when the key is turned. The same is true of determinism versus indeterminism. With a deterministic world, we have predictability. With an indeterministic world, we lose predictability.
'Reliable' is a redundancy
It may be a redundancy, but as long as there is the notion of indeterminism, we need 'reliable' to distinguish a deterministic system (one that, given specific inputs, will always produce the same result) versus an indeterministic system (one that, given specific inputs, will sometimes produce the result and sometimes not).
So, I'm going to hang onto 'reliable' for the sake of precision. Determinism presumes a world of perfectly reliable cause and effect, such that every event is reliably necessitated by prior events.
Meanwhile, back in the restaurant...
Every item on the menu is, by definition, a true alternative, something we may choose or may just as easily decline. One of them will be inevitably chosen. The others will inevitably not be chosen. But all of them will inevitably be real alternatives.
It's an alternative for countless people, each with their own proclivities.
Every item on the menu is viewed as a real alternative by every customer. This is a logically necessary truth. Choosing requires at least two real options to choose from. If there is only one alternative, then choosing will not happen. For example, if the menu listed just the Steak, then everyone would be ordering the Steak, but no one would be choosing to order it (other than by choosing to enter the "We Only Have Steaks" restaurant in the first place).
All ordering their preference according to their own state and condition, one orders steak, the other orders fish, someone orders pizza.
Yes. All choosing what they would order according to their own goals and reasons as they were at that time and place. We are not arguing that they would order anything else. We are simply pointing out that they each could have ordered whatever they wanted from the menu.
Different items may ordered by different people at a given time, including an individual at different times - according to their state and condition in that instance in time - but there be no alternate actions at any point in time.
At each point in time, each person will inevitably have the same menu, inevitably listing the alternate possibilities that they can choose, whether they choose that item or not.
This, then that and nothing else. That is the point.
Of course. And that is what will happen every time. There will be the menu of alternate possibilities, the person will be able to choose any item on the menu, but they will inevitably order a specific dinner, based upon their own current goals and reasons.
That it is the state and condition of the system, including each and every person, that determines all actions in any given instance.
I really don't think that what Harry orders will have anything to do with what I order. Nor will it be the state of the restaurant that controls what I will order.
It will be my own inner necessity that determines what I will order. And the causal mechanism of that necessity is my own choosing according to my own goals and reasons.
Meanwhile, regarding entailment ...
Within a deterministic world, it will sometimes be entailed that we will make the choice for ourselves, of our own free will, and it will sometimes be entailed that a choice will be imposed upon us against our will.
Entailment is ubiquitous.
Yes. And the key insight here is that entailment is made irrelevant by its own ubiquity. It is like a background constant, that appears on both sides of every equation, and can be subtracted from both sides without affecting the result. Deterministic entailment is a grand triviality. The intelligent mind simply acknowledges it, and then ignores it. It is never appropriate to bring it up, because it never makes any difference to any human scenario. It contains only one piece of totally useless information, fully elucidated by the philosopher Doris Day in the song "
Que Sera, Sera. Whatever will be, will be".
'Free will' is just a term.
Free will is when a person decides for themselves what they will do, while free of coercion and undue influence. This is a significant distinction that most people understand and correctly use, especially when assessing a person's responsibility for their actions. Consider, for example, the following question: "Were the professor's student subjects required to participate in his experiments in order to pass his course, or did they volunteer of their own free will?" Is there any question in your mind as to the meaning of the term 'free will' in that sentence?
''Wanting to do X is fully determined by these prior causes. Now that the desire to do X is being felt, there are no other constraints that keep the person from doing what he wants, namely X.'' - Cold Comfort in Compatibilism.
Ironically, that quote demonstrates that determinism poses no threat to free will, because determinism will never make us do anything that we don't already want to do.