How to Check a Claim

You saw something online. Is it true?

Veridi is a fact-checking system. You give it a claim - something someone said, posted, or published, or your own phrasing of a statement - and it tells you whether the claim is accurate, with evidence and reasoning you can inspect.

Here’s what happens when you submit a claim:

  1. Veridi finds evidence. It searches for primary sources - government data, peer-reviewed research, court records - and ranks everything it finds by reliability.

  2. It checks for tricks. Disinformation follows patterns. Someone might use real statistics to create a false impression, or cite sources that all trace back to one unreliable origin. Veridi checks for eleven specific techniques that make false claims look credible.

  3. It gives you a verdict. Not just “true” or “false” - most real-world claims aren’t that simple. Veridi uses nine categories that reflect how claims actually work: True, Mostly True, Mixed, Mostly False, False, Misleading, Lacks Context, Outdated, and Unverifiable.

  4. It shows its work. Every assessment includes the evidence found, the quality of each source, the confidence level, and any manipulation techniques detected. You can evaluate the reasoning yourself.

What Veridi is not

It is not an oracle. Veridi follows a documented process to evaluate evidence. When the evidence is unclear, it says so. When experts genuinely disagree, it reports the disagreement.

It is not a search engine. It doesn’t just find information; it evaluates the quality and reliability of what it finds, checks for manipulation, and applies structured decision-making to reach a verdict.

It is not infallible. The methodology was tested against 97 claims and got 96 right. The one it partially missed had the correct verdict but slightly low confidence because a source was unavailable. That’s a strong track record, but it’s not perfection, and we welcome efforts to create challenges that the system fails outright, so that we can iteratively improve.

How confidence works

Every Veridi assessment includes a confidence percentage. This is not “how sure we are it’s true” - it’s how strong the evidence is.

A claim can be clearly false with 75% confidence. That means the evidence strongly points to false, but the sources aren’t top-tier. If better sources were available, confidence would be higher, but the verdict would be the same.

The confidence system has built-in limits. If the best evidence available is from news articles, confidence is capped at 65%. If it’s only social media, the cap drops to 50%. This prevents the system from being fooled by volume - ten unreliable sources don’t equal one reliable one.

See it

View example assessments to see what Veridi’s output looks like in practice.