Here is the classic determinist argument:
(1) The laws of physics dictate how matter behaves.
(2) Therefore, the present doesn't branch out into a multitude of possible futures. There is only one possible future and nothing that you do is your choice.
Question 1(a): According to the laws of nature, has any event ever caused another event to occur?
Question 1(b): How do you explain what it means to say "event A caused event B" without considering what would have happened if event A had not occurred?
Question 1(c): Suppose event A is some future event that we expect to occur. If there are no alternative futures and event A actually occurs, then doesn't that imply that event A had to occur and that we cannot meaningfully speak of event A as the cause of any other event?
Question 2(a): Given the assumption that we cannot meaningfully speak of what would have happened if the past had been different, does it follow that we cannot meaningfully speak of what would have happened if some observations had not been made?
Question 2(b): Is it meaningless to say, "Matter would have behaved according to the laws of physics even if no one had been watching"?
Question 2(c): Is there any reason to believe that matter obeys the laws of physics when no one is watching?
Question 3(a): The first time that you heard the word "dictate" used to describe what occurs when some active entity dictates to some controlled entity, was the active entity a human being?
Question 3(b) If you now wish to say that all power to dictate is vested in the laws of physics and that people therefore have no power to dictate anything, then aren't you trying to establish a meaning for the word "dictate" that is in conflict with its original meaning?
Question 3(c) Suppose I have no vocabulary to say that a given thing "moves." Instead I say, "It is like a Cheetah. It is not like a tree." Suppose I learn about Zeno's arguments and I become convinced that nothing moves. To express the idea "nothing moves", what would I say? To express the idea "no Cheetah moves", what would I say?
Question 4(a) If all decision-making processes are controlled by the laws of physics, then does all power to make intelligent decisions reside in the laws of physics?
Question 4(b) Is intelligence the power to make intelligent decisions? (The word "decisions" shouldn't be assumed to mean major life decisions relating to work, marriage, etc. It is intended in a broad sense that includes decisions made in the process of solving problems on pencil-and-paper tests.)
Question 4(c) If all power to make intelligent decisions resides in the laws of physics, then does no entity other than "the laws of physics" have intelligence?
Question 4(d) Is there any more reason to believe "people don't choose" than there is to believe "people have no intelligence"?
(1) The laws of physics dictate how matter behaves.
(2) Therefore, the present doesn't branch out into a multitude of possible futures. There is only one possible future and nothing that you do is your choice.
Question 1(a): According to the laws of nature, has any event ever caused another event to occur?
Question 1(b): How do you explain what it means to say "event A caused event B" without considering what would have happened if event A had not occurred?
Question 1(c): Suppose event A is some future event that we expect to occur. If there are no alternative futures and event A actually occurs, then doesn't that imply that event A had to occur and that we cannot meaningfully speak of event A as the cause of any other event?
Question 2(a): Given the assumption that we cannot meaningfully speak of what would have happened if the past had been different, does it follow that we cannot meaningfully speak of what would have happened if some observations had not been made?
Question 2(b): Is it meaningless to say, "Matter would have behaved according to the laws of physics even if no one had been watching"?
Question 2(c): Is there any reason to believe that matter obeys the laws of physics when no one is watching?
Question 3(a): The first time that you heard the word "dictate" used to describe what occurs when some active entity dictates to some controlled entity, was the active entity a human being?
Question 3(b) If you now wish to say that all power to dictate is vested in the laws of physics and that people therefore have no power to dictate anything, then aren't you trying to establish a meaning for the word "dictate" that is in conflict with its original meaning?
Question 3(c) Suppose I have no vocabulary to say that a given thing "moves." Instead I say, "It is like a Cheetah. It is not like a tree." Suppose I learn about Zeno's arguments and I become convinced that nothing moves. To express the idea "nothing moves", what would I say? To express the idea "no Cheetah moves", what would I say?
Question 4(a) If all decision-making processes are controlled by the laws of physics, then does all power to make intelligent decisions reside in the laws of physics?
Question 4(b) Is intelligence the power to make intelligent decisions? (The word "decisions" shouldn't be assumed to mean major life decisions relating to work, marriage, etc. It is intended in a broad sense that includes decisions made in the process of solving problems on pencil-and-paper tests.)
Question 4(c) If all power to make intelligent decisions resides in the laws of physics, then does no entity other than "the laws of physics" have intelligence?
Question 4(d) Is there any more reason to believe "people don't choose" than there is to believe "people have no intelligence"?