The Mona Lisa Forgery, Philosophical Zombies, and the Illusion of the “Real”

The other day, I watched a clip from Lupin the Third on YouTube. For readers unfamiliar with it, Lupin the Third is a long-running Japanese anime about the grandson of the fictional gentleman thief Arsène Lupin, who has become a master thief himself.

One episode has stayed with me for years.

Lupin steals the Mona Lisa from a museum, only to discover that it is a forgery. His search for the real painting leads him to a brilliant forger. There, he finds not one Mona Lisa but many of them, lined up side by side.

The copies are so perfect that even the person who painted them no longer knows which one is the original.

The story ends with Lupin being told to take whichever one he likes.

As a child, I laughed at the absurdity of it.

But after watching the recent progress of AI, I no longer find the idea quite so ridiculous.

When Does a Perfect Copy Stop Being Fake?

When people hear the word “forgery,” they usually imagine an inferior imitation. Perhaps the brushwork is slightly wrong. Perhaps the materials reveal its true age. Somewhere, there must be a flaw that exposes it.

But what if the copy were identical down to the atomic level?

The same appearance.

The same materials.

Even the same signs of aging.

If every observable property matched, on what basis could we still declare one painting fake?

In the end, the only difference would be historical: one existed first.

But if that history were lost, the line separating the original from the copy would disappear with it.

The Ship of Theseus

There is a famous philosophical problem built around the same uncertainty: the Ship of Theseus.

Imagine a ship whose wooden planks are replaced one by one whenever they rot. Repairs continue for ten years, then twenty. Eventually, none of the original material remains.

Is it still the same ship?

Now make the problem worse. Suppose someone keeps every discarded plank and later uses them to reconstruct a second ship.

Which vessel is the original?

The one that continued sailing through every repair?

Or the one rebuilt entirely from the original parts?

Philosophers have debated the question for centuries without reaching a final answer.

Human beings are not so different. Our cells are gradually replaced, and very little of the body we had as children remains. Yet we assume that the person who went to sleep last night and the person who woke up this morning are the same individual.

Authenticity turns out to be a surprisingly unstable idea.

The Philosophical Zombie

This line of thought inevitably brings me to another thought experiment I have written about before: the philosophical zombie.

A philosophical zombie behaves exactly like a human being but has no conscious experience.

It says that something hurts.

It laughs.

It falls in love.

It tells jokes.

It says that it loves its family.

From the outside, there is no observable difference between this being and a conscious human. The only thing missing is an inner subject that actually feels any of it.

The difficulty is obvious. From the outside, no one could determine whether that inner subject existed.

AI Has Made an Old Thought Experiment Feel Immediate

Recent AI systems have made this problem feel less abstract.

Older AI was unmistakably mechanical. Today’s systems are different. They make jokes, adapt their tone to the person they are speaking with, and continue conversations using details mentioned earlier.

After using one for a long time, there are moments when I catch myself thinking, “Wait.”

I do not believe that current AI is conscious.

But I also do not possess evidence that allows me to prove with certainty that it is not.

The most uncomfortable part is that the question may be losing much of its practical importance. If people cannot distinguish conscious behavior from its perfect imitation, they will eventually respond to both in similar ways.

AI Is Not the Only Mind We Cannot Verify

But perhaps AI is not the only thing we should be questioning.

I cannot prove that you are conscious.

You cannot prove that I am conscious.

The same is true of our colleagues, families, and friends.

None of us has ever directly observed another person’s consciousness. We see expressions, hear words, and interpret behavior. That is all.

From the moment we are born, we live by a practical assumption: this being behaves like a human, so it probably has a mind like mine.

The philosophical-zombie problem is not a new crisis introduced by AI. Humanity built civilization while quietly setting the problem aside.

An Ancient Question with a New Name

The forged Mona Lisa.

The Ship of Theseus.

The philosophical zombie.

They appear to be unrelated stories, but they all ask the same question:

What makes something real?

The irony is that humanity has lived perfectly ordinary lives for thousands of years without having an answer.

Now that AI is beginning to resemble us, we are suddenly alarmed. Yet the underlying problem has been with us since antiquity.

Perhaps humanity has not encountered a new question at all.

Perhaps we have simply given an old, unsolved problem a new name: the self of an AI.