Lessons from the Wolf

Let’s start with a familiar fable: The Boy Who Cried Wolf.

A shepherd boy watches his master’s sheep near the edge of a forest. The days are long. The work is easy. The boredom is relentless. So, one afternoon he runs toward the village shouting, “Wolf! Wolf!” The villagers drop everything and rush to help — only to find no wolf at all. He does it again. And again.

Then one evening, a wolf actually appears. The boy screams for help. But this time, no one comes. The villagers assume it’s another lie. The wolf attacks. The sheep are lost.

As children, we were taught the moral: don’t lie.

But there’s another layer to this story — one that feels especially relevant today.

There’s a Name for That
Humans are wired to find patterns. We connect events, spin stories, and search for cause and effect — it’s automatic and often helpful.

But it can also mislead us.

When things happen close together, our brains link them. The sequence feels meaningful. It gives us a sense of control. Too often, we build stories after the fact, and they feel right … even if they aren’t.

This common misstep even has a name: post hoc ergo propter hoc — Latin for “after this, therefore because of this.” Just because one event follows another, we assume the first caused the second.

We all have heard the warning: correlation is not causation.

And yet … we fall for it anyway.

Cause vs. Coincidence
This fallacy shapes countless everyday beliefs:

• Your home baseball team loses the playoff game — and you’re convinced it’s because you attended. You wore the wrong jersey. You sat in the wrong seat. You “jinxed” them.
• You cut out gluten and your headaches improve. The gluten must have been the culprit — ignoring the fact that your sleep, stress, and hydration also improved at the same time.
• A new employee starts, and the main copier breaks. Clearly, the new employee caused it.

The pattern feels real. So, we treat it as real.

Higher Stakes
In medicine, the consequences can be far more serious:

• A dog stops eating shortly after a minor fall. It’s natural to assume the accident is to blame — until testing reveals an unrelated cancer.
• Someone starts a new allergy medication and notices fewer seasonal symptoms. The medicine gets the credit — though pollen levels had naturally dropped.
• A patient receives a flu vaccine and develops a mild fever days later. People assume the vaccine caused it — even though the fever may be from an unrelated virus.

Physicians aren’t immune to this bias. Good medicine requires resisting the seductive simplicity of “after this, therefore because of this.” Improvement after treatment does not automatically prove the treatment worked. That is precisely why science demands controlled studies, replication, and careful analysis.

Science asks harder questions: Is the relationship real? Is there evidence? Can it be reproduced? Or is it coincidence wrapped in a compelling story?

Wolf or Not?
Let’s return to the fable.

When the villagers heard “Wolf!” again, they relied on past experience. The boy had lied before. The pattern seemed obvious. Why question it?

But circumstances had changed — and no one reconsidered. This time, the wolf was real.

What lingers isn’t just the lie — it’s the certainty. A story repeated enough becomes “fact.”

We do the same every day, connecting dots and trusting patterns because it makes the world feel orderly. Often it works. But sometimes the pattern is incomplete, the sequence coincidental, and what feels obvious isn’t true. Events may occur together, but proximity isn’t proof.

As W. Edwards Deming said, “Without data, you’re just another person with an opinion.”

Stories are powerful, but they are not proof. Sometimes the wolf is real. Sometimes it isn’t.

The challenge — for all of us — is to pause before we decide, question before we conclude, and let evidence, not instinct alone, guide the way.

Happy reading,
Suzanne Daniels, Ph.D.