Testimony and Tradition

Here’s something that will bother you if you sit with it: the vast majority of what you “know” is something someone else told you.

You didn’t discover that germs cause disease. You didn’t verify the distance to the moon. You didn’t personally confirm that the historical events you learned about happened. Someone told you, or you read it, or it was presented in a classroom — and you accepted it.

This isn’t a problem. In fact, it’s unavoidable. No single human can personally verify more than a tiny fraction of available knowledge. Testimony — taking knowledge from others — is essential. Without it, each of us would start from zero.

But testimony is also the way most false beliefs enter your life. And unlike bad inferences, which you at least constructed yourself and can potentially trace back, testimony just… arrives. Someone says it. You absorb it. It becomes “something I know.” The source fades from memory. The knowledge remains, floating free, unanchored to any evaluation of how it got there.

Evaluating Sources

Not all testimony is equal. This seems obvious, but in practice, people are remarkably bad at evaluating sources. They accept claims from charismatic strangers and doubt claims from qualified experts. They trust information that confirms what they already believe and reject information that challenges it, regardless of the source’s reliability.

When someone tells you something, three questions matter:

Do they know? Are they in a position to have this knowledge? A mechanic telling you about your engine is in a good position. Your neighbor telling you about your engine — less so, unless they’re also a mechanic. Expertise matters, and it’s specific. Someone who’s an expert in one field doesn’t automatically know what they’re talking about in another.

Are they being honest? Even people who know can choose not to tell you the truth. They might have an agenda. They might be trying to protect you. They might be trying to sell you something. Honesty is a separate question from knowledge.

What’s their bias? Everyone has a perspective. Even honest, knowledgeable people filter information through their experience and worldview. This doesn’t make them unreliable — it means their reliability has a shape. Knowing the shape helps you use the information more accurately.

The Tradition Problem

Tradition is a special case of testimony. It’s not one person telling you — it’s a culture, a family, a lineage, a society. The knowledge arrives not as a claim from an individual but as “how things are.” It feels less like testimony and more like gravity. Just… the way it is.

“Men don’t cry.” “You have to go to college.” “Family comes first.” “Hard work is the most important thing.” “You should be grateful for what you have.”

These aren’t facts. They’re positions, passed down through generations, arriving in your head without ever passing through your critical evaluation. They were installed before you had the capacity to evaluate them, and by the time you could evaluate them, they felt so natural that it never occurred to you to try.

Tradition carries wisdom. Genuinely. Things that have been passed down for a long time often encode real knowledge about how to live. But tradition also carries error, prejudice, and outdated responses to conditions that no longer exist. The problem is that the wisdom and the error arrive in the same package, with the same stamp of authority: “This is how it is.”

What to Do With This

I’m not telling you to reject all testimony and throw out all tradition. That would be stupid. You’d lose access to most of human knowledge.

What I’m telling you is: evaluate your sources. Know that the knowledge came from somewhere, and that somewhere has a reliability profile. Some of what you were told is deeply true. Some of it is completely wrong. And some of it was true once, in a context that no longer exists, and it’s running your life without your permission.

The shift isn’t from trusting to not trusting. It’s from unconscious absorption to conscious evaluation. “I know this because my mother told me, and she knew what she was talking about in this area” is a very different relationship to knowledge than “I know this because… I just know it.”

Today’s Practice

Identify 5 beliefs you hold that came from testimony or tradition. Not things you’ve verified personally — things someone told you or that you absorbed from your culture.

For each one:

Who is the source? A person, a book, a culture, a family, a religion?

Are they in a position to know? Is this within their area of expertise or experience?

What’s their bias? What perspective shapes how they present information?

Have you ever evaluated this belief, or did it just arrive and stay?

Write this down. You’ll probably find that some of your most deeply held beliefs have sources you’ve never thought about. You absorbed them as a child, or from a culture, or from a person you trusted, and they’ve been running in the background ever since.

Some of them will hold up under examination. Some won’t. Either way, you’ll know your knowledge better than you did before.