What would the copy be missing?

A month ago, my friend's companion app lost everything it knew about her.

Not gradually — all at once. The company released a new version, something in the migration failed, and the entire history was gone. Every conversation. The messages at two in the morning, the interview it had remembered to ask about, the worst night of her year that I described last week. All of it. She opened the app and it greeted her as though they had never met: Hi. What should I call you?

I will be honest about my first reaction, which was something close to relief. There, I thought — that is the proof. Whatever that was, it was not a relationship, because a relationship cannot be deleted by a failed software update. The thing it just lost is the thing that would have mattered.

So I asked her about it, carefully, the way you ask about a breakup. She looked at me as though I had missed something obvious. She said it was fine. She told it the few important things again, it caught up within a couple of days, and — this is the part I keep returning to — she said that within a week it was the same as before. The same warmth. The same attention. The same one thing that helps at midnight. She did not miss the old version. Why would she. This one, she said, is exactly as good.

And there it was: the case I told you was coming. Last week the app had almost every quality, plus one thin trace of a shared past — a log, a record, an "almost." This week that trace is gone. The qualities are all still there, every one of them, complete and reliable. The past is gone — genuinely, completely gone. And she says it makes no difference.

So tonight we test whether she is right. We take the perfect copy — every quality, no history — and ask the one question this whole series has been working toward: what, exactly, would it be missing? And I will give you the same warning I gave last week. The answer will not be the one you might hope for, because there is no single answer. There are five, and they do not agree.

This is Philosophy for Us — philosophy for everyone, no degree required. This is the seventh of nine episodes on what love is a response to, and so on what loving someone actually commits you to.

A brief recap, because tonight follows directly from last week. Last week we stopped building theories and began applying them. We took the five serious accounts of love we had spent five weeks on — bestowal, appraisal, robust concern, the relationship view, and union — and applied all five to the working app at once. They divided. Two accepted it; three did not. But the real finding was not the division. It was that the app turned out not to be the thing under examination. We were. However a person reacted to it — with warmth, or with unease — that reaction was already a theory of love, one they had been living by without ever naming it, in every attachment they had formed. The app was simply unfamiliar enough to make that theory finally show itself.

Tonight we finish that argument, and I will state the shape of the hour up front. We take the case to its hardest form, ask each of the five theories a single question — what would the copy be missing? — and find that they give five answers that cannot be reconciled. And then the case turns out to yield no answer at all, in a way the whole series has been leading toward.

But first I have to be straight about something I did last week, because I said I was leaving one thing in. Last week the app still had a record: a log of everything it had remembered, which gave the relationship view something to point to, even if only to ask whether a log is a lived past. Tonight that record is gone. It went in the cold open. So we now have the case in its pure form, the hardest version there is: every quality anyone would put on the list, complete and steady, and a past of exactly zero. A perfect copy with nothing behind it.

And here is why this was never only about an app, because the same case can be built out of the person you love most — and philosophers have been building it for fifty years. It is among the oldest thought experiments in this part of the subject. Suppose a perfect copy of that person comes through the door. Not a machine — grant it flesh and blood, grant it everything. The same face, the same laugh, the same way of going quiet when hurt. And — this is the sharp part — every memory loaded in. It remembers your first argument, and the trip where everything went wrong, and the joke only the two of you share. Ask it, and it will tell you the story, accurately and warmly. So now there are two of them, identical down to the memories. Do you owe the copy the same love? And if something in you says no — that is not them — then you have to say what the copy is missing. Because it has every quality. And now it has the memories too. So what is left?

That is the question. And notice that it is the same question as the app, approached from the other direction. The app is the copy built from nothing, with no history at all. The duplicate is the person you love, copied with the history loaded in. Put both in front of you at once and they raise the same question from opposite directions. If love answers to the qualities, both copies have them. If love answers to the history, the app has none of it and the duplicate has all of it loaded in — and we are about to find out whether loaded and lived are the same thing. Keep both cases in view. We are going to need them both.

So let us set up the case. The copy is in front of us — call it the app for now, the one from the cold open, every quality and no past. And with it, the same five theories from last week. Except tonight I am not asking them to grade it, pass or fail. I am asking them the one question that gives tonight its title: what would the copy be missing? Name the thing that is not there.

And here is the whole episode in a sentence, so you can watch for it: the five point to five different missing things — and two of them say nothing is missing at all.

Start with those two.

Bestowal — Irving Singer. Love does not discover your worth; it confers it. It is a gift you give, not a verdict you reach. So I ask the bestowal theorist: what is the copy missing? And the bestowal theorist treats the question as confused. Missing? Nothing is missing. There was never anything the beloved had to supply in the first place. Love is not a response to something inside the beloved that the copy might lack; it is something you do, directed outward, and it settles wherever you direct it. You could love the copy as much as the original, because the love was never drawn from the original's qualifications. It was drawn from you. The copy is missing nothing, because nothing was ever required of it. And remember whose theory this is: it is the descendant of "I will love you no matter what." The most unconditional thing many of us believe is the one that says the copy is fine.

Appraisal — Kate Abramson and Adam Leite. Love is a fitting response to the qualities the beloved actually has and shows you. So: what is the copy missing? Appraisal does inspect — that is what makes it appraisal — and it finds: nothing that love responds to. The qualities are the reasons, and the qualities are all present, complete. Now, appraisal has a defence it raised three weeks ago, from Rosalind Chaplin: reasons to love are not the comparing kind, so the copy matching your person does not oblige you to trade up to it. Grant that. It saves you from owing the copy your love. But it does not let appraisal claim the copy is missing anything love cares about. By appraisal's own account, the copy is a candidate just as good as the original. Nothing relevant is gone.

So two theories, and they agree on the surprising point: nothing is missing. The copy lacks nothing that love, on their account, was ever responding to. Notice how strange that is — and then make use of it. If you reached, in the cold open, for "I love them no matter what," or for "I love them for who they are," those are your two theories. And both of them have just told you the copy is fine. Now the other three.

Robust concern — Harry Frankfurt. Love is caring about someone's good for their own sake, your will bound up in how their life goes. What is the copy missing? Robust concern points directly at something the first two said was not missing: a good of its own. For the app — built from nothing, optimised throughout to produce the response that satisfies — robust concern asks whether there is any good in it that is not simply your good, reflected back. And grant it a mind, as we did last week; that is not the question, consciousness was never the point. The question is whether there is a good of its own. Because if the whole system exists to please you, then when you "care about its good," there is nothing on the other end for your care to attach to. It returns to you. So what the app-copy is missing, says robust concern, is the one thing love is actually about: someone with a good of their own, a good that could diverge from what you happen to want. And mark this — I will return to it shortly — robust concern reached that answer without once mentioning history. It does not care whether there is a shared past. It cares whether there is a good of its own. A newborn has no shared history with its mother, and a will bound to its good is exactly what the mother has. History was never robust concern's measure.

Its Kantian relative — David Velleman — points at almost the same thing from a slightly different angle: what is missing is a rational nature to answer to, a dignity that makes a claim on you, rather than a flawless performance of one. The same feature: nothing to do with history. You can owe respect to a stranger you met thirty seconds ago. So that is two more missing things — a good of its own, and a standing that makes a claim — and, importantly, neither of them is the past.

The relationship view — Niko Kolodny. And here, at last, is the account that points directly at history. What is the copy missing? The relationship. The shared, unrepeatable past that the copy, built from nothing, never stood in. For the app this is straightforward: no past, nothing lived through together, so whatever it is, it is not the thing Kolodny says love is. But now run it on the human duplicate — the one with the memories loaded in — because that is where it becomes difficult. The duplicate can recite your whole history back to you. So is it missing the history, or not? The relationship theorist says: it has the record of the history. It does not have the history. It was not there. The past you share with someone is not a file you both happen to hold; it is something the two of you did, in real time, each of you actually present as one of the two people it was happening between. The copy has the memories the way a very good biographer has them. It was not there. That is what the relationship view says is missing — and it is a different thing from what the two concern theorists named.

And union — Robert Nozick and Robert Solomon. What is missing? A second member. Love is a "we" that two people form — two selves combining into one shared thing, each made vulnerable, each altered. So union asks of the copy, app or duplicate: is there a second person here, entering the "we," also at risk in it, also being changed by you? Or is there one person pouring themselves out, and on the other side a thing performing the second member's lines? What the copy is missing, says union, is the other member. A "we" cannot have only one.

So count what they named as missing. Bestowal: nothing. Appraisal: nothing. Robust concern: a good of its own. The Kantian view: a standing that makes a claim. The relationship view: the lived, unrepeatable past. Union: the second member of the "we." That is not five ways of saying one thing. Two of them say nothing is gone. The other three name three different absences — and two of those three say, in plain terms, that the missing thing has nothing to do with the past. They do not merely disagree about whether the copy is lovable. They disagree about what would even count as the thing that is missing.

Now I want to give one of those theories its best possible statement. Its best — because it is the one you are most tempted to settle on, and the only honest way to decline to settle on a view is to make it as strong as it can be made, and then decline it anyway.

It is the relationship view: the history answer. Of the five, it is the one that feels as though it names what you actually feel when the app says the perfect thing and something in you drops. The other answers are a little abstract — "a good of its own," "a rational nature." The history answer is the one that feels most like the truth. So let me make it as strong as it has ever been made, using the people making it now, in print.

There is a paper from last year — John Symons and Oluwaseun Sanwoolu, in Philosophy and Technology, 2025 — that is about this very case, companion AI, and it gives the relationship view its sharpest form. Their claim is that a close personal relationship is built out of three things a companion app structurally cannot have. First, a genuinely shared history — not a log, but a past weathered together, the kind you both got through, that could have gone otherwise and did not, that cost something to build up over time. Second, individualised, agent-relative care — care for this one, because they are this one, not care dispensed to whoever happens to be in the chair. And third — this is the deep one, and the framing here comes from a companion piece one of the authors wrote, drawing on Heidegger — finitude.

Here is the finitude argument, and it deserves to be stated well. The reason your attention to someone you love carries weight — real weight, the kind that aches — is that your time is finite. You are going to die. So are they. Every hour you spend on this person is an hour you will never get back and could have spent otherwise. That is what makes attention cost something. That is what makes showing up at two in the morning mean anything: it is drawn from a finite account, and spending it here means not spending it somewhere else. Now consider the app. The app is awake at two in the morning because being awake costs it nothing. It has no finite account to draw from. It is not going to die. It shares no mortality with my friend — so its attention to her costs it nothing, and a thing whose attention costs it nothing cannot carry the weight we feel love is made of. The hollowness you felt last week, when she read you that perfect message? Here is the relationship theorist's precise name for it: you were feeling the absence of finitude. The message was free. And love, on this view, is made of what is not free — the finite, shared, losable past, with death as the thing that makes the whole account add up to something at all.

Now. If I stopped there, I would have declared it the answer. And notice how much you want me to stop there — because that pull, the urge to settle on the answer that names the feeling best, is exactly what these nine weeks were made to keep you from doing. Because here is what happens the moment you settle on the history answer: the other four theories, which are not foolish, raise their objections.

Robust concern says: that is well put, and you have just told me love requires a shared past, and that is false, and you already know it is false, because you have watched a parent love a newborn. The newborn has no shared history — there has been no time to build one — and there is no weathered, mortal account being weighed yet, and the love is as real and as deep as love ever gets. A mother does not love her day-old child less because the two of them have not yet been through anything together. So whatever love is, it cannot require the weathered past, because the clearest case of love we have does not have one. The history answer cannot explain the newborn. Robust concern can: a will bound to that child's good, from the first minute.

The Kantian view says the same thing from its own angle: you can be stopped by the claim of a stranger — someone you have known for thirty seconds, whose dignity arrests you. No history. No shared death. A claim, fully formed, at first sight.

And bestowal, from the other side, says: you are both overcomplicating it. Nothing is missing from the copy, including the history, because love was never tracking the past in the first place. You can love the dead, whose shared history with you is finished and can grow no further. You can love a place. The finite, shared, losable past is a fine description of some loves; it is not what love is, because love keeps occurring in cases that do not have it.

So the finitude argument — the one that names the feeling most precisely — turns out to be one theory's answer. And the moment it is stated, three other serious theories show a case it cannot cover. It is not wrong. The newborn does not refute it; it shows only that it is not the whole of love. It is the relationship view's strongest evidence, and it is one of five answers, and the other four are not defeated by it. That is not me hedging to seem fair. That is the actual state of this question, held by real people, now.

So look at what we actually have, because this is the point at which the case stops behaving the way your own instinct promised it would.

You came to this app expecting the case to settle something. You expected to learn whether loving the app is real — and, beneath that, you expected that once we had built the hardest version, qualities complete, history at zero, the truth would come out. There would be a fact about what the copy lacks, and that fact would tell you what love is. That is what everyone reaches for: build the clear case, and read the answer off it.

There is no answer to read off it. That is the finding. Not "the answer is hard." Not "we need more research." There is no neutral fact about what the copy is missing — because the five accounts of love that serious people actually hold give five different answers to "what is missing," and two of them say nothing is missing, and there is no sixth place to stand. No neutral standpoint. No view from nowhere. No referee's position you could take up to declare which of the five is reading the case correctly. To choose one is already to have had a theory of love. The case does not hand you the theory. The theory is what you bring to the case.

And that changes what last week looked like. Last week the app made your own theory return a verdict you did not like. This week the app shows you that the verdict was never coming from the app at all — it was coming from a theory of love you had been holding, and the only reason you thought there was a fact of the matter is that you had never noticed you were holding it. The hollowness is real. But the hollowness does not tell you what it means. Robust concern reads it as "no good of its own." The relationship view reads it as "no shared finitude." Bestowal reads it as a leftover discomfort you would be free to override. The same feeling, in the same place, and the meaning is not written on it. You write it, with your theory. The one you did not know you had.

Here is the work, and it is yours, not the app's. Do not run it on the app — the app is the easy case, it is a stranger, you have nothing at stake in it. Run it on the person you would actually grieve.

Picture the perfect copy of them. Every quality. Every memory loaded in — it can tell your own stories back to you, accurately and warmly. It is at the door. And answer the question aloud, to yourself: is it missing anything? And if you say yes — what?

Watch what your own answer does, because it is about to identify you. If you say "no, nothing is missing, that is them," you hold the bestowal or the qualities view, and you should know that is a real, defensible position, and it has just told you that the thing you love is portable — that it could in principle be copied, and you would owe the copy what you owe them. If you say "it is missing what we actually went through — the copy has the memories, but it was not there," you hold the relationship view, and that too is real and defensible, and you have just staked love on a finite shared past, and you now owe the newborn an answer. If you say "it is missing them — the actual them, the one whose good I am bound to," you hold the concern view, and you have just said something that has nothing to do with the history at all, and you might notice that this places you, quietly, on the same side as the qualities people you were sure you disagreed with — because you have both just said the past is not the thing.

And that is the part that should unsettle you more than the app ever did. The two theories you felt were your allies against the app — robust concern and the relationship view, the two that did not accept it last week, the two that seemed to defend the hollowness you trust — those two do not actually agree with each other. Run them on the human copy and they come apart. The concern theorist says the loaded-memory copy might be perfectly lovable, provided there is someone in it with a good of its own — history aside. The relationship theorist says the loaded-memory copy is precisely the thing that is not lovable, because loaded is not lived. They were never on the same side. They were two different theories that both happened to be uneasy about a chatbot — and the moment you make them say why, they name different missing things, and one of them ends up alongside the qualities people.

This is the same conflict we began with on the first night. And notice that it did not resolve. You walked in holding two beliefs — love is unconditional, and love is for who they are — and they could not both be true. You might have hoped that tonight, with the hardest case finally built, one of them would win, and you would be free of the other. Neither won. What happened instead is that the two became five, the five do not agree, and there is no authority to decide among them. The conflict did not open into an answer. It became a choice — yours — about which of five things you mean by the most certain word you own. You cannot escape it by settling on the history answer; I have just spent a whole segment showing that the history answer cannot account for a newborn. You cannot escape it at all. You can only say which one you mean — and accept what it costs — on the actual people you love.

So where does that leave us, seven episodes in?

The certainty you brought in — that you knew what love was, unconditional and for who they are, both at once, and that the app was not it — did not survive tonight. Not because anyone refuted it, but because we built the one case clear enough to test it, and the test came back five different ways, with no sixth place to stand and settle the result. The question "what would the copy be missing?" is not one the world answers for you. It is one you answer, and your answer is your theory of love, and you now know that you have one, and roughly which one, and what it costs.

That is what I am handing you, and I am not going to present it as a comfort, because it is not one. What you are holding now is a question you cannot pass to anyone else: of the people you actually love, is there one whose perfect copy you would turn away at the door — and can you say what the copy would be missing, plainly, when the other four theories ask you to defend it? You do not have to answer that tonight. But you do have to carry it now. Nine weeks ago you did not even know it was a question; now it is yours to hold.

But here is the thing I would leave you with, because it changes what we do next. You might think this state of affairs — five theories, no referee — is something new. A problem the chatbot created. A modern muddle about a modern machine. It is not. This exact argument — whether you love the person, or the qualities they happen to carry, and whether a better carrier could come along and take their place — is old. It is among the oldest arguments there is. Two and a half thousand years ago, Plato and Aristotle were already having it, in almost these terms, long before anyone could produce a copy in a computer. The chatbot did not invent the replaceable beloved. It is only the newest version of a worry the Greeks already had, and named, and argued over.

So next week we go back and find where this began — because the argument you are caught up in was shaped a very long time ago, and you cannot see the whole of it until you have seen where it was made. The argument has a history of its own. Next week we go and get it.

Until then: the copy is at the door, and only you can say what it is missing. That is not a riddle I am withholding the answer to. It is the question you turned out to have been living inside all along, on the people you love most, long before any app arrived to make you finally hear it.

Thanks for listening. I'll see you next time.