Texas Sharpshooter Fallacy

Shrink Definition

The Texas sharpshooter fallacy is drawing the target after the shots land, so random hits look like a bullseye. We notice a cluster in data, then build a theory around it as if it were predicted. The name comes from firing at a barn, then painting the target around the tightest group. It turns noise into a false hit.

Plain language

We find a random cluster, then pretend we aimed for it all along.

Shrink Insight

If you choose the target after seeing the data, almost anything looks like a hit.

Why it matters

It underlies false health scares, cherry-picked results, and shaky self-conclusions from a few coincidences. Naming it pushes you to ask whether a pattern was predicted in advance or found afterward.

Common misunderstanding

People think a striking cluster proves a cause. Clusters happen by chance, and choosing which one to explain after the fact proves little.

Shrink Perspective

A prediction made before the data is worth far more than a pattern found after.

Shrink Reflection

Where have I drawn the target after seeing where the shots landed?

Shrink Step

Before trusting a found pattern, ask what you would have predicted beforehand.

Shrink Minute

Think of a coincidence you treated as fate and ask if you drew the target afterward.

Shrink Takeaway

Aim first, then shoot, not the other way around.

Medical boundary

Evidence summary

A well-recognized reasoning error in statistics and epidemiology, illustrating the multiple-comparisons problem.