A rule against vinegar, and a full legal system
A hand-drawn conker bracket with a margin rule against vinegar is proof that children invent full governance the moment there's a prize on the line.

Eight names in a column, connected by ruled lines through three rounds to a single boxed winner.
CHAMPIONSHIP sits across the top in capitals. Two names have been rubbed out and rewritten. In
the margin, in smaller writing: no vinegar.
That last line is the document doing its real job — a rule against cheating that presumes, correctly, that somebody already tried it.
Why does it look like an official document?
Because it borrows the two devices any verdict needs: a hierarchy, and a note about the exception.
A knockout bracket is already the shape of a ruling — eight entries funnel down to one name in a box, and there's no argument about which direction the lines run. Add a handwritten rule in the margin and it stops being a game record and starts being something closer to a small piece of jurisprudence, drafted by whoever had the pencil.
Why didn't anybody have to teach the bracket format?
Because elimination is the first tournament structure a group reaches for, not the first one they're taught.
Eight people, one prize, and the fastest fair way from eight to one is pairing them off and repeating. Nobody hands a child a diagram for this; the shape turns up on its own once there's more than one contender and one prize, which is most of what a bracket is proving in the first place. It's the same instinct behind a scoreboard nobody was asked to keep — a group ranking itself without waiting for an adult to set the format.
What actually makes one worth printing?
The specific mess: whose names, and which two got rubbed out.
The real eight names and the rounds as they were actually fought, plus the detail with the most to it — leaving the correction in rather than redrawing a clean copy afterwards. A tidied-up bracket looks like a certificate. A bracket with a rewritten entry looks like it happened, on a bench, over several breaks.
Can I use real names on it?
Yes — a private record of your own group needs nobody's permission.
The names in the hero image are invented because a stranger's aren't anybody's to use, but the shirt itself is meant to be made with real ones: whoever actually played, ranked however it actually went. The one thing worth clearing is a genuine event with its own organisers and its own name — an official competition run under a real title, where the branding belongs to whoever runs it. A garden version, refereed by nobody, needs no licence at all.
Does it work for a competition that wasn't conkers?
Yes — anything that ran as a knockout works exactly the same way.
An office ping-pong ladder, a family board game tournament staged over a wet week, a sports day relay — the format doesn't know what the game was, only that eight, or four, or sixteen went in and one came out boxed at the end. It's a good gift for whoever actually organised it, which is usually one specific person nobody else volunteered to be.
Won't the crossings-out look like a mistake?
They read as evidence, not error, once the piece is printed at a size where they're legible.
A scribbled-out name next to its replacement is unambiguous on a page: something changed, and somebody recorded the change rather than start again. The worry only holds if the correction gets lost in reproduction, which is a print question rather than a design one, and it's the reason the rubbing-out needs to survive at real size instead of shrinking into nothing, which is really a question of getting the layout right on a chest-sized panel rather than a judgement about the mess itself.
Does it print well?
Yes, kept close to what it actually is — pencil and two inks, not a full-colour illustration.
Graphite grey carries the bracket lines and names, and one accent — a hard black or a single red for
the box round the winner and the CHAMPIONSHIP heading — is enough, the way the original was
actually made with whatever pen was to hand. Fine pencil shading disappears into the weave, so the
lines want redrawing bolder than the source rather than scanned at true weight. The winner's box
should stay a hard rectangle; everything else — the connecting lines, the handwriting — keeps its
own irregular edge, which is what makes it read as writing rather than a template. Oatmeal or a
similar undyed cotton suits it best; it already reads as paper.
How do I get one made?
Describe the bracket at JustOG — the eight names, the actual rounds, and whatever rule got written in the margin. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
The rubbed-out name is still faintly there underneath, if you hold the paper up to the light.