It is a specific implication that you have failed to prove. You have not proved that if things "would" not have gone another way, that they also "could" not have gone another way. "Would not" does not logically imply "could not". It may "sound" like it does, but it does not.
It's entailed in the given definition. Your own definition. As defined, 'fixed' and 'no deviation' entails it.
Nope. As I keep pointing out, what was fixed and entailed, with no deviation, was that I "could have" ordered the steak would necessarily be
true under those precise circumstances, despite the fact that I never "would have" ordered the steak under those same circumstances.
It is a simple matter of English grammar, the logic of the language, that if "I can order the steak" was ever true at any point in the past, then "I could have ordered the steak" will be forever true when referencing that same point in time from the future. It is a simple matter of the tense of the verb, present tense and past tense.
Now, was "I
can order the steak" ever true? Yes. When choosing between the salad and the steak, it was required that there be
two things that "I can do". By logical necessity, "I can order the salad" and "I can order the steak" were both
true. We know this because if one of them were false, then the choosing would immediately stop. There would be only one option, and we would simply proceed with that option without further thought.
But that was not the case. We had two options, the salad and the steak, and it was possible to choose either one. Choosing the salad was "possible". Choosing the steak was also "possible". Both were things that I was "able" to do at that time and place. Both were things that I "could" do, even though I only "would" do one of them. So, the choosing operation continued to the evaluation step. While considering the steak option, I recalled having bacon and eggs for breakfast and a double cheeseburger for lunch. And I recalled that my dietary goal was to eat more fruits and vegetables. So I chose the salad for dinner instead of the steak.
Due to those prior causes (the bacon and eggs and cheeseburger) it was always inevitable that I would choose the salad for dinner. But I did not know that until I recalled from memory my breakfast and lunch. That is how choosing works. It inputs two or more things that we "can" do, evaluates them, and outputs the single inevitable thing that we "will" do.
At the end of every choosing operation, there will always be both the single thing that we "will" do, plus the other things that we "could" have done, but decided not to do.
Now, you seem to think that determinism magically makes the sentence, "I could have ordered the steak" false. But it doesn't.
If we were to run this through a replay, it would always be the same. At the beginning there will always be at least two different things that I can choose. At the end, there will always be the single inevitable thing that I will choose as well as the other thing(s) that I would not choose, but could have chosen.
It is how the words work. The single inevitable thing that we "will" do is chosen from among the many things we "can" do.
But if you illogically conflate "can" with "will", you end up with false conclusions.
Determinism does not change what these words mean. Determinism can only assert that the notions of "can" and "will" will appear as mental events that are reliably caused by prior mental events. Both our "could have" and our "would have" are equally causally necessary and inevitably will appear, exactly when they do.
In short, the "could have" is just as inevitable as the "would have".
You feel that you could have, but if events determined, each action is fixed and your perception of could have done otherwise had I wanted to is an illusion.
That's still incorrect. The notion that I "would" have done otherwise, given my same goals and reasons, would be an illusion. But the notion that I "could" have done otherwise, given
different goals and reasons, would be a matter of fact. Keep in mind that "could have"
always implies different circumstances.
Think of errors....a moment after something bad happens, you think, I shouldn't have done, or said that. Had it been possible to do otherwise, you would not have made the error in the first place.
The possibility to do otherwise is logically required to correct the error. If there is no possibility to do otherwise, then there is nothing we can call an "error".
We may look at the past and wish we knew then what we know now, but of course that was impossible, you were what your were at the time, things were not different, and cannot have been different, consequently events happen as they must.
One cannot look at the past and wish it were different without the notion of "possibility". Learning from past mistakes involves imagining what we "could" have done differently. If there are no other possibilities then we cannot plan a different future. The future would simply repeat the same mistakes over and over.
That's the cost of conflating "can" with "will". If only a single thing "can" happen, then only
that single thing "will" ever happen. But the logic of our language allows for
multiple things that "can" happen, multiple "possibilities", while restricting us to a
single thing that "will" happen and a single "actuality".
We don't choose our own condition or the events of the world that shape our thoughts and actions.
You keep saying these weird things that contradict the facts on the ground. Our choices cause our actions. Our actions cause changes in our own condition as well as producing events in the world. So, we are actually part of what creates our own condition and the events of the world that shape our thoughts and actions.
You cannot have determinism if you keep erasing us from the causal chain. Our chosen actions cause events. Any version of determinism that ignores or excludes us is incomplete, and therefore false.