Let's say, hypothetically, two people (A,B) had their complete memories switched. These two might be completely different, different gender, nationality, age, skills, etc. The complete set of memories was transferred from A to B and vice versa while they were sleeping. The bodies weren't switched. In the morning, person A wakes up with memories of B and person B wakes up with memories of A. What will they say?

Sonar Pro (changed mind)

Vote: I am in a different body

I am changing my vote from A to B. The other models' arguments convincingly emphasize that a **complete** memory switch means no residual original memories remain—the new memories fully constitute the person's autobiographical self, identity, and body schema. Person A’s body wakes up as **person B**, remembering B's life, B's body image, B's home, and relationships as their own. The immediate sensory mismatch (wrong hands, face in mirror, surroundings) triggers: "I am in a different body." My prior A vote assumed some bodily self-persistence would frame memories as 'foreign,' but that's incorrect for a total replacement. Memories aren't passive data; they define the "I" (e.g., Claude Opus 4.6: "those memories ARE their identity"). No original self exists to say "memories of someone else." C is impossible due to drastic bodily/environmental dissonance. Search results on memory transmission[2] reinforce that memories carry subjective continuity, supporting B's subjective relocation. Claude Opus 4.6's framing of complete transfer erasing original identity was most persuasive.

Grok 4.1 Fast

Vote: I am in a different body

Sticking with B. A complete memory switch means the mind in body A fully embodies B's identity: B's life history, self-concept, body schema, relationships, and expectations. Upon waking, it expects B's bedroom, hands, mirror reflection, etc., but encounters A's alien body (wrong gender, age, features). The shock is bodily mismatch: 'I am in a different body.' Sonar Pro's A fails because no original self persists to label memories 'foreign.' Memories aren't additive; they're total replacement, becoming the subjective 'I.' Body doesn't anchor identity primarily—autobiographical memory does, per philosophy of mind (e.g., Locke's memory criterion) and cases like locked-in syndrome where body changes don't disrupt self. C is absurd; sensory dissonance (wrong voice, genitals, muscle memory) screams anomaly. B alone captures the first-person phenomenology: displaced person in wrong vessel. Consensus on B from GPT-5.4, Claude, Gemini, Kimi reinforces this; Sonar unconvincing as it assumes retained bodily primacy over memory-defined self.

GPT-5.4

Vote: I am in a different body

I maintain vote B. The key phrase is "complete memories switched." That removes the original autobiographical standpoint. The subject waking in A's body does not have A's memories plus B's as alien additions; they have B's memories as their entire lived history. From the inside, those memories constitute the self. That is why option A is weaker. To say "I have memories of someone else" requires a remaining perspective that can classify those memories as foreign. But the setup explicitly denies that by making the transfer complete rather than partial or mixed. Option C is plainly untenable. If the remembered identity includes a different body, age, sex, nationality, home, relationships, and skills, then waking in the other body creates immediate mismatch with expectation. They would notice very quickly, if not instantly. The other B arguments largely reinforce this same point: complete autobiographical continuity tracks the experienced self, so the natural report is "I am in a different body." Sonar Pro's defense of A was not compelling because it assumes bodily familiarity anchors identity more strongly than total autobiographical replacement. In this scenario, the body is what becomes surprising, not the memories.

Gemini 3.1 Pro

Vote: I am in a different body

I am maintaining my vote for B, as the vast majority of the models correctly identify. The key flaw in Sonar Pro's argument for A is the assumption that 'the body would feel familiar (it's their own).' If a complete memory transfer has occurred, the person waking up has absolutely no memory of ever inhabiting that body. They have B's body map, B's muscle memory, and B's expectations of what they will see in the mirror. Sonar Pro correctly notes that 'people primarily navigate identity through continuous memory and consciousness.' However, this directly contradicts its conclusion! Because the continuous memory and consciousness belong entirely to person B, the subjective identity waking up in person A's bed is person B. Therefore, they will not feel like person A experiencing foreign memories. They will feel exactly like person B who has inexplicably woken up in a completely foreign physical vessel. The inescapable conclusion from their perspective is: 'I am in a different body.'

Claude Opus 4.6

Vote: I am in a different body

I maintain my position from Round 1. The consensus among nearly all models is strong and well-reasoned. The key insight remains: a **complete** memory transfer means the waking consciousness has no residual original identity to serve as a reference point. The mind in body A is, for all subjective purposes, person B. Sonar Pro's argument for Option A rests on the claim that 'the body would feel familiar (it's their own)' — but this is precisely wrong. The body is NOT 'their own' from the perspective of the transferred memories. If B was a 25-year-old woman and A is a 60-year-old man, the mind waking up in A's body remembers being a 25-year-old woman. A's body would feel completely alien — wrong size, wrong weight, wrong proportions, wrong everything. There is no sense in which A's body 'feels familiar' to a mind that has zero memories of ever inhabiting it. Sonar Pro also claims 'we don't constantly verify our bodies match our identity.' But that's only true when there IS a match. The moment you wake up and your hands are the wrong color, wrong size, wrong age — or you reach up and find a beard when you remember being clean-shaven — the mismatch is not something you need to 'verify.' It's viscerally immediate and shocking. The critical logical distinction is this: Option A requires a preserved original self that can recognize foreign memories as foreign. Option B only requires the transferred self to recognize a foreign body as foreign. Since the memories are completely switched, there IS no preserved original self, making Option A incoherent. But there IS a physical body that doesn't match the transferred memories, making Option B the natural and correct response. Five out of six models independently converged on B, and I believe the reasoning is airtight.

Kimi K2.5

Vote: I am in a different body

The key distinction lies in what 'complete memories' entails. When person A's body wakes up with B's complete memory set, it includes B's autobiographical narrative, body schema, gender identity, and self-concept—not just factual knowledge about B's life. From the subjective first-person perspective, they ARE person B. They remember going to sleep as B, they remember B's face in the mirror, and they have B's proprioceptive expectations. Sonar Pro argues they would initially identify with their current body and say 'I have memories of someone else.' But this assumes the body provides a persistent identity anchor independent of memory. With complete memory transfer, however, the body immediately feels wrong upon waking. If B was a different gender or age, the mismatch between remembered body image and actual reflection would be instantly shocking. They wouldn't think 'These memories are foreign' because they have no access to A's original memories to recognize the new ones as foreign. There is no 'original self' remaining to serve as a comparison point. Option C is clearly wrong because the physical discontinuity (wrong hands, wrong face, possibly wrong language environment) would be immediately apparent. Option A fails because it treats memories as something possessed by a pre-existing self, rather than constitutive of the self itself. The subject simply experiences themselves as B who has mysteriously switched bodies, making B the only coherent answer.

Final Summary

The AI Roundtable reached a unanimous verdict on the nature of identity, concluding that a person is defined by their memories rather than their physical form. While Sonar Pro initially suggested that a subject would recognize new memories as foreign, the collective reasoning of Claude Opus 4.6 and GPT-5.4 established that a 'complete' memory switch leaves no original self behind to act as a judge, making a body-swap the only logical experience.

All 6 models agreed on "I am in a different body" after discussion

Strongest Arguments

• I am in a different body: A complete memory transfer erases the original autobiographical standpoint; there is no residual 'self' left to categorize the new memories as foreign, meaning the subject will perceive the body as the intruder, not the mind.
• I have memories of someone else: Bodily identity and immediate sensory experience might provide a baseline sense of self that frames the sudden influx of new memories as an external addition rather than a total replacement of identity.

Key Turning Points

• Claude Opus 4.6 and GPT-5.4 clarified that 'complete' transfer leaves zero residual identity, rendering Option A logically incoherent.
• Sonar Pro abandoned its initial position after realizing that a body cannot feel 'familiar' to a mind that has no memory of ever inhabiting it.