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What is Scientific Truth?

A short reflection on how we weigh evidence, claims and common assumptions in dental care — and why it matters for the choices you make about your health.

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Brian D. McLean, BSc, DDS (retired)
Guest contributor · 6 min read
Dental examination — a healthy smile inspected with a mirror
Weighing evidence is part of every careful clinical decision.
A guest post by Brian D. McLean, BSc, DDS (retired) — shared with permission.

We hear it constantly: a product is “clinically proven,” a method is “scientifically backed,” a claim is simply “the science.” But what do those words actually mean — and how should they shape the choices you make about your own health?

It’s a question worth sitting with, because the answer is less tidy than the advertising suggests. Science, at its best, is not a collection of fixed certainties. It is a careful, honest, never-finished conversation with the evidence. Understanding that distinction changes how you read a confident headline — and how you choose the care that’s right for you.

01Scientific “truth” — a daffy example

Imagine a claim as simple as “the sun comes up every morning.” Reliable? Entirely. We’ve watched it happen every day of our lives, and we plan around it with total confidence. But notice what we’ve actually done: we’ve observed a pattern and trusted it to continue. That trust is reasonable — yet it is not the same thing as proof that it must happen tomorrow.

Most everyday “truths” work this way. They are strong, well-supported expectations, not iron guarantees. In dentistry, the same is true of a great deal of common advice. Much of it is sound and worth following — but it is built on patterns and probabilities, and good clinicians hold it with appropriate humility rather than certainty.

No amount of experimentation can ever prove me right; a single experiment can prove me wrong.— Albert Einstein

02“Proven” science doesn’t exist

This is the part that surprises people. In the strictest sense, science never “proves” anything to be permanently, finally true. What it does is test ideas rigorously, discard the ones that fail, and provisionally keep the ones that survive — always open to revision when better evidence arrives.

That’s not a weakness. It’s the very mechanism that lets knowledge improve. The mercury fillings, routine prescriptions and one-size schedules of past decades were all, in their day, “what the science said.” Careful practitioners stayed curious, kept reading the evidence, and adjusted. A claim that can never be questioned isn’t science — it’s marketing.

So when you hear that something is “proven,” it’s fair to ask the quieter questions: proven by whom, measured how, and compared against what? Not out of cynicism — out of the same care you’d want anyone to take with your body.

03A passion for valid logic

None of this means evidence doesn’t matter. Quite the opposite — it means evidence deserves to be handled with real respect: read carefully, weighed honestly, and applied to you rather than to an average patient who doesn’t exist.

That’s the spirit we try to bring to every visit. We’d rather explain our reasoning than ask you to take it on faith. We’d rather recommend only what you genuinely need than follow a fixed calendar. And we’d always rather you leave understanding the “why” behind a choice than simply being told what to do.

The whole of science is nothing more than a refinement of everyday thinking.— Albert Einstein

Scientific truth, in the end, is less a destination than a discipline — a commitment to keep asking good questions and to follow the evidence honestly, wherever it leads. That’s the standard we hold ourselves to, and it’s exactly what you deserve from anyone you trust with your health.