Astral Codex Ten

Nuno Sempere

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Nuno Sempere

Article

Nuno Sempere is a recurring person in the Astral Codex Ten archive, appearing 12 times across 12 issues between February 07, 2022 and January 13, 2026. The archive places it in contexts such as “My favorite commentary on this decision is Nuno Sempere’s The American Empire Has Alzheimers”; “ACX Grants recipient Nuno Sempere somehow got grant money of his own”; “Gustavo Lacerda and Nuno Sempere very kindly drew this picture”. It most often appears alongside Twitter, Manifold, Polymarket.

Metadata

  • Category: People
  • Mention count: 12
  • Issue count: 12
  • First seen: February 07, 2022
  • Last seen: January 13, 2026

Appears In

Source Context

Recovered passages from the original issue text. When the raw archive preserved outbound links inside the source passage, they are listed directly under the quote.

The Passage Of Polymarket
February 07, 2022 · Original source
My favorite commentary on this decision is Nuno Sempere’s The American Empire Has Alzheimers. He lists various bad decisions the US has made, from Vietnam to the bungled withdrawal from Afghanistan last year. In this last case, President Biden said there was “no circumstance where you see people being lifted off the roof of an embassy” barely a month before we saw exactly that.
Inline links: The American Empire Has Alzheimers
Open Thread 211
February 13, 2022 · Original source
3: Related: ACX Grants recipient Nuno Sempere somehow got grant money of his own and is giving out $10K in prediction market related microgrants. Apply here if interested.
Inline links: Apply here
Mantic Monday: Ukraine Cube Manifold
February 14, 2022 · Original source
So it looks like forecasters expect that, conditional upon Russia invading at all, there’s an 80% chance they’ll take Mariupol in the east, a 66% chance they’ll take Kharkiv (also eastern, but only a third ethnic Russian and currently aligned with the central government), and only about a 30% chance they take Kyiv or Odessa. See also this thread full of speculation in the subreddit. As for me, I’m going all in on “yes” after seeing this tweet: Alexander Cube Last week I speculated that to truly realize the potential of prediction markets, we’d need one that was real money, easy to use, and easy to create markets on. Gustavo Lacerda and Nuno Sempere very kindly drew this picture and named it after me: Nobody has reached the promised land at the furthest point. But all three connected vertices are occupied. Augur is real-money and lets people create their own markets, (but it’s impossible to use - it’s made of complicated crypto contracts that nobody’s made a workable front end for yet). Polymarket is real money and easy to use (but doesn’t let people create their own markets; apparently they’re nervous about resolution disputes). Manifold is easy to use and lets people create their own market, but it’s not real money (they’re American and centralized, so they have to follow anti-gambling regulations). Manifold Markets Speaking of which, they’re open! As the cube suggests, Manifold is a site where anyone can create their own (play money) prediction market. They set the question and they decide when and how it resolves (with everyone else just out of luck if they decide to fake it or rug-pull). It’s a bold strategy, but boy oh boy are people liking it so far: Not actually in order This is a semi-randomly selected sample of Manifold markets, but let’s go through them one by one. The Ukraine market is the biggest on Manifold. It’s also deeply out of step with every other prediction market and the top non-prediction-market authorities - who are all giving numbers in the 50s and 60s. I don’t understand how this is so low - yes, play money < real money, but mostly because play money doesn’t get enough people betting. Here lots of people are betting - it’s the biggest market on the site, and since you only start with $1000 either twenty people have bet everything or more people have bet a fraction - but it’s still wrong. I tried to spend some play money to correct it and it snapped back to just as wrong as it was before. I have no explanation. Midnight The Stray Cat is the second biggest market on Manifold, just after Ukraine. I guess the Internet really liking cats shouldn’t be a surprise at this point. In case you need to do research first I’m told this is the cat in question: Props to Manifold for a bunch of markets like the third one on there, where they eat their own dog food by using their market to predict how their business decisions are going to go. ACX Bot has copy-pasted all of my predictions from 2022. At some point they should be able to compare their results with Zvi (ie a single very smart person), with the contest many of you entered (ie an average of formless crowdsourced predictions), and Metaculus (ie a non-monetary forecasting tournament). I’m looking forward to it! Most of you already know Lars Doucet, who’s written some great ACX posts on Georgism. I don’t know what possessed him to make a Joe Rogan Georgism interviewee market, unless he’s gunning for the position. Valinor is a group house on my street, with ~a dozen people living in and around it. We’ve been talking about fixing the backyard for a while. Now we can bet about whether it will happen. Having a number for this actually affects some of my decisions a little. Connor is hijacking the prediction market to make a poll, which is pretty cute. Dwayne Johnson does not have a 15% chance of winning the election. Manifold is suffering from the usual play money problem, where if you only start out with $1000 in play money, nobody wants to lock it up for three years to make a 15% profit. Vivek’s market, “Will I believe that 13177 is a prime number”, is pretty unusual. I’m interpreting it as a test/demonstration of prediction markets’ information-gathering ability. If you don’t know something and it’s hard to Google, you can make a prediction market about whether you’ll believe it in the future, and people who are able to figure out the answer will bet on it. Based on the 97% YES rate, I’m guessing 13177 is in fact a prime number. What else can you do this with? TANSTAAFL’s “Will I Be Convinced That Justin Trudeau Is Not Fidel Castro’s Son?” market is maybe pushing the limit of this methodology. Anyway, there are lots of me-too prediction markets but this is something genuinely new under the sun. Maybe it will be awesome itself, but I’m also hoping it helps bigger players realize how much more is possible. This Week In Metaculus A few new questions on intelligence enhancement, eg: The question explicitly allows embryo selection, but says it must raise IQ ten points and be available for <25% median income to count. Trivial improvements to existing embryo selection will top out around 9 points, so this seems to be predicting something more interesting, maybe iterated embryo selection at the very least. I’m probably slightly bearish on this one; I believe if it existed someone would find a way to get it, but I think the regulatory climate might be able to prevent the relevant research indefinitely. Improving adult IQ is really hard. This is a bold thing to speculate about! Atmospheric CO2 was 300ish for most of pre-industrial history, 400ish now, and rising. This question predicts 600 in 2100, which sounds like what happens if global warming gets a bit worse but eventually stabilizes. I’m less sure. I think if we make it to 2100, we’ll have so much technology that atmospheric CO2 can be whatever we want it to be. But maybe we’ll want it to stay where it is; once there’s been a lot of global warming and people have moved / shifted lifestyles, it could be equally disruptive to cool the planet back down. Right now it’s 5%, the official government prediction is 10% by 2030, but this market says 17.6%. But look at that probability distribution! It’s a lot of people saying 10%ish, plus a very long tail of very big numbers. I think people are disagreeing about how exponential this change is going to be. Shorts Metaculus is holding an essay contest for people who want to use their AI-related prediction markets to argue the future of AI. $6500 available in prizes.
Inline links: this thread full of speculation in the subreddit, Gustavo Lacerda, Nuno Sempere, https://substackcdn.com/image/fetch/$s_!ukFP!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F851b95c2-a103-43fc-8e6f-339468fa1469_485x320.png, Augur, Polymarket, Manifold, https://substackcdn.com/image/fetch/$s_!j26W!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2Fcba2cb25-7980-446d-8050-499c35c4e56f_919x1017.png, predictions from 2022, ACX posts on Georgism, Will I Be Convinced That Justin Trudeau Is Not Fidel Castro’s Son?, https://substackcdn.com/image/fetch/$s_!V2bV!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2Fca419ec2-7b91-44cd-80b0-2aad1baa4c2f_766x166.png, The question, https://substackcdn.com/image/fetch/$s_!Ah6n!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F1ff4f28d-1901-45f2-85bc-8f1c2120ecd1_770x187.png, https://substackcdn.com/image/fetch/$s_!zSK8!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F80e3383c-6f68-412a-ac90-ca63236bdb10_769x167.png, This, https://substackcdn.com/image/fetch/$s_!frCz!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F976d1b66-daee-43d1-948a-500e77ac5a2f_764x164.png, this market, holding an essay contest
Nuno Sempere is giving out $10,000 in forecasting-related microgrants.
Inline links: in forecasting-related microgrants
22
October 18, 2022 · Original source
The Manifold Markets team, along with Nuno Sempere, Linch Zhang, Ozzie Gooen, and other rationalist/EA forecasters.
Inline links: The Manifold Markets team
5: Nuno Sempere newsletter September.
Inline links: Nuno Sempere newsletter September
ACX Grants: Project Updates
November 04, 2022 · Original source
7: Repository / Search Engine For Forecasting Questions (8/10) Nuno Sempere at metaforecast.org was able to hire a developer to “make the backend significantly better and add a bunch of functionality” - you can see a longer list of updates here. The developer has since left for other forecasting-related work and the project is moving more slowly.
Inline links: metaforecast.org, here
Links For December 2022
December 28, 2022 · Original source
41: Effective Altruism Forum: The Spanish-Speaking Effective Altruism Community Is Awesome. EA has been trying for years to expand beyond its Anglosphere origins. Spanish is the natural first stop: a big language, linguistically and culturally similar to English - but it was really slow going. Now thanks to a few hard-working Hispanophone community organizers, it’s finally working out, and there will be an EA Global conference in Mexico City this January. For some reason I find this really inspiring. Contains a shout-out to ACX Grants recipient Nuno Sempere.
Inline links: The Spanish-Speaking Effective Altruism Community Is Awesome, an EA Global conference in Mexico City this January
Links For February 2023
February 09, 2023 · Original source
25: People sometimes talk about the value of bets as a mechanism for settling disputes. I think this works well either when the dispute is about a future prediction that will be obvious when it happens, or when both people are really careful and honest and trust each other a lot. More creative uses - like bets on how debates on hot-topic issues will go - work less well. Nuno Sempere’s forecasting newsletter on the attempted Kirsch-Wilf bet:
Inline links: Nuno Sempere’s forecasting newsletter
23
April 25, 2023 · Original source
2: Nuno Sempere: Tracking The Money Flows In Forecasting. EG Metaculus runs off of ~$6M in grants; Kalshi has $30M in VC funding. Gnosis, a crypto protocol that never went anywhere, apparently had a $230M market cap at one point, but this is probably some kind of fake crypto valuation trick.
Inline links: Tracking The Money Flows In Forecasting
Links For January 2025
January 17, 2025 · Original source
37: In response to my post on H5N1 bird flu, Alina Chan asked about the risk of a bird flu lab leak. Here’s my response, Nuno Sempere’s response, and Peter Miller’s pre-response.
Inline links: Alina Chan asked, my response, Nuno Sempere’s response, Peter Miller’s pre-response
Links For July 2025
July 01, 2025 · Original source
32: Superforecaster Nuno Sempere (maybe with the rest of the Samotsvety team?) has launched askaforecaster.com. You can get a “quick take” for $20, a “thoughtful response” for $150, or an “in-depth look” for $1000.
Inline links: askaforecaster.com
ACX Grants Results 2025
October 13, 2025 · Original source
Nuno Sempere, $50K, for disaster forecasting and response. Nuno runs Sentinel, a team of superforecasters which tracks incipient disasters (pandemics, wars, etc) and brainstorms pre-hoc and post-hoc responses. Their model for response are groups like VaccinateCA, a small team of Californians who noticed that the state’s COVID vaccine policy was disorganized and made a site that helped connect people with spare vaccination capacity. You can see their blog here. Nuno is an ACX Grants evaluator; due to conflict of interest, this grant is being covered in conjunction with an outside funder.
Inline links: here
Forecasting: Austin Chen, Nuno Sempere
Mantic Monday: The Monkey's Paw Curls
January 13, 2026 · Original source
I’ve been asking for this so long that Nuno Sempere dubbed it the Siskind Cube:
Inline links: dubbed it