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By Nigel Guy · 3 min read
A demo video shows a tool doing something remarkable, flawlessly, in ninety seconds. It's tempting to treat that as evidence the tool can do that thing — for you, on your work, most of the time. A demo proves something much narrower: that it happened at least once, under conditions someone chose. The distance between those two claims is where most disappointment with new tools comes from.
The rule: a demo shows that something is possible; a capability is something that happens reliably, on inputs nobody picked in advance, at a cost you can live with — judge every showcase by the gap between the two.
| Rung | What it shows | What it doesn't show |
|---|---|---|
| 1. It happened once | The thing is possible | How often, or under what conditions |
| 2. It works on chosen examples | It succeeds when inputs are favourable | Whether your inputs are favourable |
| 3. It works on other people's inputs | Some generality | Whether it holds on your material |
| 4. It works on your inputs, repeatedly | Reliability for your case | Long-run cost and upkeep |
| 5. It works in your routine, over weeks | A real capability, for you | — |
Most launch material sits on rung one or two. That isn't dishonest in itself; it's simply a different claim from rung five, and it should be read as one.
Pick one real task from your last fortnight — not the easiest, not the strangest. Run it through the tool three times with the same input. Count how many of the results you would have used without meaningful editing. That's a rough, honest reading of where the tool sits for you, and it's worth more than any number of showcases. If you want to push it towards rung five, repeat with a few different real tasks over the following weeks and note whether the results hold.
Skip judging a tool by its best-case showcase — and skip dismissing it because of one viral failure clip, which is also a demo, just selected in the opposite direction. Skip "it'll get there" as a reason to adopt now; you'd be adopting what exists today, not what's on a roadmap. And skip comparing two tools on their demos alone; you're comparing two sets of editorial choices.