There are things I'm certain happened that I couldn't prove to anyone. Not big things. A shop that sold one specific thing in one specific arrangement, a song that played once on a station I can't name, an afternoon whose exact light I can still call up on demand. I hold them with total confidence and zero evidence. For most of what happened before the middle of the nineties, that isn't a failure of memory. It's the ordinary condition of it.

The reason is mechanical, not sentimental. If you wanted a photograph in 1987 you loaded a roll of film with room for 24 or 36 frames, paid for every one whether it came out or not, and waited a week to find out. So you didn't waste them. Most of the pictures people did take stayed in a drawer, seen by almost no one. Home video was worse, because a blank VHS cost money and shelf space, so families taped this month's recording straight over last month's, and the picture was rough enough that nobody mourned what got erased. Television aired once and was gone. The shape of it is simple: making a durable trace was expensive, and almost nobody thought a given Tuesday was worth the cost.

The internet's own memory is shorter than it looks. The Wayback Machine feels bottomless, like it reaches back forever. But the Internet Archive was only founded in 1996, and its crawlers capture exactly one thing: the web that already exists. They cannot reach back and photograph 1987, because in 1987 there was almost nothing online to photograph. The archive starts where the web starts. Everything earlier, which is most of two decades, sits on the far side of that line. I've traced before how much of the human record sits outside any index at all, and the pre-web years are the sharpest version of the problem.

There's a well-worn worry called the digital dark age, and it usually means decay: floppy disks nobody can read, Zip drives long gone, magnetic tape whose coating flakes off the plastic and takes the recording with it. Vint Cerf, of all people, warned about it in 2015. That version is real, and it's the one where the disk outlives the drive that read it. But it assumes the file exists and is rotting. The quieter loss is bigger. You can't lose a file you never made, and most of the eighties was never a file to begin with.

What that leaves is a strange private country between memory and evidence. I know things I can't corroborate, can't share properly, can't even check against anyone else, because their version is exactly as unbacked as mine. Two people who were both there will remember the layout of a room different ways, each of them sure, with nothing to reach for. No photograph of it, no receipt, no floor plan filed anywhere. The disagreement can't be won because it can't be settled, and neither side's certainty thins out for the lack of proof.

This is a condition with an end date. Anyone who grew up after the turn of the century has the opposite problem, a childhood uploaded and timestamped and backed up in three places, every unremarkable day kept whether it earned keeping or not. The unprovable memory is turning into something only certain people will have known, a narrow window between a world too expensive to record and one that records everything by reflex.

I go back and forth on whether that's a loss. Part of me wants the proof, the photograph that would confirm the light really was that colour. But proof turns a memory into a record, and a record is a flatter, more finished thing. The memories I'm surest of are the ones with nothing behind them, rehearsed so many times that they're more mine than any print would be, and wrong, almost certainly, in ways I'll never catch.

Somewhere in the early nineties the record thickens and never thins again, a life documented end to end. Before that line sits a whole world I can describe in detail and can't produce a single frame of, and I trust it more than the part that's written down.

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