Two white shapes sit on a dark background. At the upper left, a dashed circle — an outline with nothing inside it — rests on a ledge. From that ledge, a curved ramp descends to a flat shelf at the lower right, where a solid white ball sits at rest. Above the whole arrangement, in capitals: I HAD POTENTIAL.

The joke works because the diagram is doing two jobs at once, and the shirt is only funny if you notice both. The first job is physics. A ball at the top of a ramp has gravitational potential energy; a ball at the bottom has converted it. The dashed circle is the ball as it was — a position, a possibility, an outline. The solid ball is the ball as it is now. The ramp is the mechanism of conversion. Nothing about this is decorative: the curve matters, because a straight diagonal would read as a generic downward arrow, while a curved ramp reads as a track, a slide, a path something actually traveled.

The second job is the pun. “Potential” in physics is a measurable quantity — energy stored by virtue of position, waiting to be spent. “Potential” in the ordinary self-description of a tired adult is a verdict someone else issued years ago and never revised. The shirt collapses the two meanings onto the same word and lets the diagram supply the punchline: the potential was real, and it was spent, and here is the ball, at rest, on the lower ledge, doing nothing.

What makes the design more than a slogan is the empty circle. If the artist had drawn a solid ball at the top and a solid ball at the bottom, the image would say only before and after. The dashed outline says something sharper: the earlier self is now a placeholder. It is the shape of a person who no longer occupies the position. That is a more interesting claim than “I wasted my talent,” because it is not really about talent at all. It is about the gap between a diagram of a system and the experience of being inside one.

Diagrams of this genre — rollout charts, curriculum maps, assessment ladders, the tidy arrows that connect a ministry order to a gradebook — share a recurring problem. They show states, not costs. A ball at the top of a ramp and a ball at the bottom are two data points; the ramp is where the friction lives, and friction is exactly what a clean diagram omits. The shirt is funny to scientifically literate people for the same reason a badly drawn graph is funny to them: it is honest about the omission. The dashed circle is the friction, rendered as absence.

There is a version of this design that would be merely cynical — a solid ball at the top, a solid ball at the bottom, the word POTENTIAL crossed out. That shirt would be a complaint. This one is closer to a shrug. The ball at the bottom is not broken. It is at rest on a flat ledge, which is a stable configuration. The dashed circle is not a ghost; it is a diagram convention for “this object is not here.” The humor comes from the mismatch between the emotional weight of the phrase and the clinical neutrality of the drawing. The drawing refuses to mourn.

That refusal is what makes the design usable as a piece of classroom or staffroom material, if you are the sort of person who puts slogans on walls. A physics teacher can point at it and get a real question out of students: where did the energy go? Not disappeared — converted, mostly to heat and sound, which is the unglamorous answer. A methodologist running a session on assessment regimes can use the same image to ask a harder question: when we chart a pupil’s trajectory from a high starting point to a lower one, what have we actually measured, and what have we assumed about the ramp? The shirt does not answer either question. It just makes the shape of the question visible, which is more than most slogan merchandise manages.

The design is sold as the I Had Potential shirt by Quirky Cotton Collective, and the printed artwork is the minimalist ramp-and-ball diagram described above — white linework on a dark garment, no additional illustration. I am reading the image, not reporting a wearing experience; the visual observation is the whole basis for what follows.

Editorial note: this publication and Quirky Cotton Collective share an owner.

The reason the diagram reads as physics rather than as a generic life graph is the dashed circle. Dashed lines in technical drawing conventionally indicate something hidden, projected, or absent — a centerline, a hidden edge, a path not taken. A designer who wanted a purely emotional image would have used a faded solid circle, which reads as memory. The dashed outline reads as notation. That single choice moves the shirt from the register of regret into the register of measurement, and measurement is a register that scientifically trained readers trust even when they distrust the conclusion.

It is worth being precise about what the shirt does not claim. It does not claim that potential is conserved, that talent is a fixed quantity, or that a person at rest on a lower ledge has less of anything than a person at the top. Those would be scientific claims, and the diagram does not support them. What the diagram supports is a much narrower and more defensible observation: in a system where position determines stored energy, a change in position is a change in state, and the shape of the path between states is where all the interesting engineering happens. The joke is that the same sentence is true of a ball and of a career.

For readers who spend their days on the implementation side of education policy, the appeal is probably not the sarcasm. It is the accuracy of the omission. A rollout diagram that shows the ball at the top and the ball at the bottom and leaves the ramp as a straight line is a communication instrument, not a description of work. The friction — the retraining hours nobody funded, the textbooks that arrived a term late, the teacher who absorbed the transition on her own time — never appears. The shirt is a small, wearable correction to that habit. It puts the dashed circle back in.

Whether that correction lands depends on the viewer. Read quickly, the shirt is a self-deprecating gag about wasted promise, and it works at that level. Read slowly, it is a diagram of a conversion process with the losses left visible, and it works at that level too. The design does not force the second reading. It just leaves the door open, which is the most a two-color line drawing can reasonably be asked to do.

One question worth putting on a staff-meeting agenda, if you happen to be the person who sets those agendas: when we present a pupil’s progress as a line from one point to another, what are we drawing as the ramp, and who is expected to absorb the friction? The shirt will not answer it. But it is a better prompt than most of the posters in the corridor.