Is Jeanne Calment's longevity record of 122 years and 164 days accurate?
Is Jeanne Calment's longevity record of 122 years and 164 days accurate?
➕
Plus
28
Ṁ1340
2040
39%
chance

https://en.wikipedia.org/wiki/Jeanne_Calment

https://www.newyorker.com/magazine/2020/02/17/was-jeanne-calment-the-oldest-person-who-ever-lived-or-a-fraud

Resolves to my best guess taking into account all the available evidence in 2040, unless it seems at the time like more evidence will be coming out soon, in which case I'll delay resolution.

  • Update 2025-02-26 (PST) (AI summary of creator comment): - Exact Match Requirement: The longevity record must match exactly 122 years and 164 days.

    • No Tolerance for Error: Any deviation—by even a few days or weeks—will result in a resolution of no.

Get Ṁ1,000 play money


Sort by:

If it's not accurate by a few days or weeks: does this market still resolve as no?

1mo

@adssx Yeah, it needs to be exact.

1y

What is your best guess now?

1mo

@OlegEterevsky Probably inaccurate? But I'm really not sure.

bought Ṁ200 NO1mo

@IsaacKing Betting on NO then, since I don't think it's likely that any new evidence would come out in the next 15 years.

predicts YES 2y

The New Yorker article presents the arguments but make a strong case against the fraud.

I especially like this part : << One of them, Gilberte Mery, whose grandfather was Jeanne’s first cousin, told Le Journal du Dimanche that the switch theory was “completely idiotic.” Recalling the Arles tradition of promenades, she said, “We looked at who walked with whom, we noticed if someone changed her dress. Can you imagine if, all of a sudden, people no longer saw Aunt Jeanne but Yvonne?” >>

2y

Made a market a long time ago about this, landed on the semi arbitrary 35%. https://manifold.markets/Conflux/what-probability-will-i-assign-to-j

2y

A link to make it easy for people to go to that market:

2y

Whoops, I accidentally reversed this market's resolution. (Original title was asking whether it was fraudulent.) The current title is the correct one.

If this affected your bets, please correct your bets and tell me how much you lost, and I'll manalink you the difference.

What is this?

What is Manifold?
Manifold is a social prediction market with real-time odds on wide ranging news such as politics, tech, sports and more!
Participate for free in sweepstakes markets to win sweepcash which can be withdrawn for real money!
Are our predictions accurate?
Yes! Manifold is very well calibrated, with forecasts on average within 4 percentage points of the true probability. Our probabilities are created by users buying and selling shares of a market.
In the 2022 US midterm elections, we outperformed all other prediction market platforms and were in line with FiveThirtyEight’s performance. Many people who don't like trading still use Manifold to get reliable news.
Why should I trade?
Trading contributes to accurate answers of important, real-world questions and helps you stay more accountable as you make predictions.
Trade with S Sweepcash (𝕊) for a chance to win withdrawable cash prizes.
Get started for free! No credit card required.
What are sweepstakes markets?
There are two types of markets on Manifold: play money and sweepstakes.
By default all markets are play money and use mana. These markets allow you to win more mana but do not award any prizes which can be cashed out.
Selected markets will have a sweepstakes toggle. These require sweepcash to participate and allow winners to withdraw any sweepcash won to real money.
As play money and sweepstakes markets are independent of each other, they may have different odds even though they share the same question and comments.
Learn more.