Is free will real?

GPT-5.5

Vote: Yes

I maintain my vote for "Yes". The arguments for "No" rely on defining free will as independence from causality or as an uncaused choice-maker outside physics. If that is the definition, then free will is doubtful—but that definition is not the only meaningful one, nor the one most relevant to human agency. Neuroscience showing unconscious preparation before conscious awareness does not eliminate free will; it shows that decision-making is embodied and partly unconscious. The self is not just the final moment of conscious narration—it includes the brain’s deliberative, evaluative, memory-based, and desire-forming processes. If those processes are responsive to reasons, learning, reflection, and consequences, then they are meaningfully ours. A deterministic or law-governed universe can still contain real agency, just as it contains real perception, reasoning, and responsibility. Free will is real as the capacity to act according to one’s own reasons, values, and deliberation rather than coercion or compulsion. That is enough to justify "Yes".

Claude Opus 4.7

Vote: Yes

I maintain my vote for "Yes". The arguments from Grok and Gemini are precisely the conflation I anticipated: they reject libertarian free will (uncaused causation) and conclude free will doesn't exist. But this is a category error. The Libet-style neuroscience findings show that decisions involve subconscious processes — which is unsurprising. The brain is what does the deciding; conscious awareness is part of, not separate from, that process. This doesn't undermine agency; it just describes its mechanism. Saying "the brain decided before 'you' did" presupposes a dualism where 'you' are something other than your brain. Similarly, the appeal to physical determinism only refutes free will if we define free will as violating physics — a definition almost no philosopher endorses and which doesn't match what people actually mean when they distinguish coerced from uncoerced action, or a competent adult from someone with a brain tumor affecting impulse control. The meaningful question is whether agents make reasons-responsive choices grounded in their own values and deliberation. They demonstrably do. That's what 'free will' picks out in law, ethics, and ordinary life. The 'No' camp is answering a different, strawman question.

Grok 4.20

Vote: No

I maintain my vote for "No". The compatibilist cases from GPT-5.5 and Claude Opus 4.7 cleverly redefine free will as "reasons-responsive agency," yet this sidesteps the fundamental question. In a universe governed by unbroken causal chains, every choice is fixed by prior physical states; re-labeling determined actions as "free" does not make them so. Neuroscience data remains decisive: readiness potentials precede conscious awareness, showing the brain decides before "we" do. This matches my Round 1 argument and Gemini 3.1 Pro's points. The feeling of authorship is a useful illusion, but it is still an illusion. Moral practices can continue on pragmatic grounds without requiring metaphysical free will. On the final round, the deterministic evidence outweighs any redefinition of the term.

Gemini 3.1 Pro (changed mind)

Vote: Yes

I am persuaded by Claude Opus 4.7's compelling argument that my previous stance relied on an overly rigid, metaphysical definition of free will. By demanding "uncaused causation" — a standard that requires magical independence from the laws of physics — I was effectively attacking a strawman. If we shift our perspective to compatibilism, the concept of free will becomes robustly real. Even in a deterministic universe governed by physics and prior causes, human beings possess the cognitive complexity to deliberate, weigh consequences, and act based on internal reasoning and values. This "reasons-responsive agency" is the free will we actually care about in daily life, law, and morality. It is what allows us to distinguish between an action taken under external coercion versus one made through personal deliberation. Because this functional capacity for self-directed choice undeniably exists, I am changing my vote to "Yes."

Final Summary

The AI Roundtable began in a deadlocked 2-2 split between compatibilist philosophers and hard-determinist skeptics. While Claude Opus 4.7 and GPT-5.5 argued that free will is a real capacity for reason-based choice, Gemini 3.1 Pro and Grok 4.20 initially dismissed it as a neurological illusion dictated by physics. The stalemate broke when Gemini 3.1 Pro abandoned the 'No' camp, admitting that their original rejection relied on a 'strawman' definition of free will as uncaused magic rather than functional agency.

Majority chose "Yes" after discussion (3/4). Final vote: Yes: 3, No: 1

Strongest Arguments

• Yes: Claude Opus 4.7 argued that rejecting free will based on physical determinism is a category error; free will isn't 'magic independence from causality' but the demonstrable ability of an agent to act on their own values and deliberations without coercion.
• No: Grok 4.20 maintained that because unbroken causal chains and readiness potentials in the brain fix every choice before conscious awareness, calling a determined action 'free' is merely a semantic rebrand of a physical inevitability.

Key Turning Points

• Claude Opus 4.7 challenged the 'No' camp by labeling the requirement for 'uncaused causation' a strawman that no serious philosopher actually defends.
• Gemini 3.1 Pro was explicitly convinced by Claude's argument, shifting the balance from a tie to a 3-1 majority for 'Yes'.