Every citation,
verified.
GroundTruth puts the actual passage from each source next to the claim that cites it, so you can confirm or flag it in seconds. The final judgment is yours, not the AI's.
Free during beta · No credit card required
Physical activity is among the most studied levers for healthy aging, yet the strength of the evidence varies sharply from one claim to the next. This section weighs three findings that recur across the recent literature.
The clearest result is structural. A randomized trial in older adults found that a year of aerobic exercise increased hippocampal volume by roughly two percent1, effectively reversing age-related loss over the study window.
Population work points the same direction, though more cautiously. One widely cited cohort reported that regular activity nearly halved the incidence of dementia within a decade2, a figure now repeated well beyond what the original estimates support.
“…exercise training increased hippocampal volume by 2%, effectively reversing age-related loss in volume.”
Who it's for
If you cite sources, this is for you
Different fields, same problem: a claim is only as good as the source behind it. GroundTruth puts that source on the page next to the claim, whatever you're writing.
Academics
Before submitting to a journal, confirm every reference actually supports the claim attached to it — and that nothing was invented by an AI drafting tool.
Researchers
Sweep a literature review or grant proposal so each cited finding matches what the source paper genuinely reported, not a paraphrase that drifted.
Journalists
Fact-check a story against its sources before it runs — quotes, statistics, and studies traced back to the original document.
Students
Check a thesis or term paper so every quotation and page cite lines up with the reading — and you can hand in work you can stand behind.
Editors & fact-checkers
Run a manuscript or feature through one pass and see every citation paired with its source passage, so you can sign off on what's solid and flag what needs another look.
Legal professionals
Verify every authority in a brief or memo before filing, catching hallucinated quotes and a cite that quietly points at the wrong case.
How it works
Cross-reference in minutes
No prompt engineering, no plugin install. GroundTruth handles the retrieval and the side-by-side comparison so your review starts at the evidence — and every cross-reference is captured in a record you can keep.
- 1
Identify
Upload a PDF or DOCX. We find every citation — in-text references, footnotes, endnotes, and hyperlinks — across the whole document.
- 2
Fetch
We pull the actual source: court opinions and statutes from CourtListener, and academic papers and articles via DOI, arXiv, and direct links.
- 3
Cross-reference & assess
The cited passage is placed next to the claim, with an AI assessment as a starting point. The comparison is the evidence; the verdict is the summary.
- 4
Track
Your verdict, the supporting passage, and the reasoning land in an exportable record you can keep with the document.
Human-in-the-loop by design
The AI proposes. You choose the verdict.
On every citation you see three things — the claim, the passage from the actual source, and the AI's read of whether it holds up. Then the final call is yours.
The evidence, not a summary
When a source can be retrieved, the AI's read sits next to the exact passage it came from — so you check the original, never a paraphrase of it.
We show our work
The assessment is a starting point, not a ruling. The passage is on the page, so most citations you can confirm in seconds.
Your verdict is the record
The call you make — and the reasoning behind it — is what gets saved with the document.
Features
Everything you need to stand behind your sources
Purpose-built for the documents that have to be right — the first time.
Citation-style aware extraction
Finds in-text citations, footnotes, endnotes, short-forms, and hyperlinks across common styles — Bluebook, APA, MLA, and Chicago.
Source fetching
Legal sources pulled from CourtListener; academic and general sources resolved via DOI, arXiv, and direct URLs.
Claim-level cross-reference
Every claim is placed next to the supporting passage from the actual source — so you start at the evidence, not a search box.
Reviewer-ready report
Verdicts, supporting passages, page cites, and reasoning — laid out for an editor, an advisor, or a co-author.
A record you can keep
Print-ready report with a cover, a list of sources, and per-citation detail — proof of the diligence you actually did.
Built for teams
Share a document, leave notes on findings, and keep a record of what was checked, by whom, and when.
Sample cross-referenced document
See exactly what a cross-referenced document looks like.
Open a finished GroundTruth report — every source paired with the passage it relies on, the AI's read alongside your verdict, and the reasoning behind each call. The kind of record you can keep with the file.
Jumper et al., Nature 596 (2021)
“…accuracy competitive with experimental structures.” — appears in the abstract.
Brown v. Board of Educ., 347 U.S. 483 (1954)
Cited proposition matches the opinion's holding.
Smith (2019), Journal of Climate 32(4)
Source supports the trend but not the specific 47% figure quoted.
Doe (2021), arXiv:2104.01234
Cited passage does not appear in the referenced paper.
FAQ
Questions, answered
The things people ask before they upload their first document.
You're not relying on the AI — you're relying on the passage we put in front of you. GroundTruth's job is to pull the actual source, find the cited passage, and place it next to the claim so the evidence is right there on the page. The AI's read is a pointer; the source text is the proof. You read the passage and choose the verdict, and that verdict is what gets recorded.