Astral Codex Ten

Porto

11 min read

Porto

Article

Porto is a recurring place in the Astral Codex Ten archive, appearing 2 times across 2 issues between August 29, 2025 and October 24, 2025. The archive places it in contexts such as “Time: Saturday, October 11th, 11:00 AM Location: Largo Alexandre Sá Pinto 44, B2 4050-027 Porto, Portugal”; “a 160 km circle includes three big cities - Porto, Coimbra, and Lisbon”. It most often appears alongside ACX, Brazil, China.

Metadata

  • Category: Places
  • Mention count: 2
  • Issue count: 2
  • First seen: August 29, 2025
  • Last seen: October 24, 2025

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.

Meetups Everywhere 2025: Times and Places
August 29, 2025 · Original source
Contact: Luis Campos Contact Info: luis[period]filipe[period]lcampos[a t]gmail[period]com Time: Saturday, September 20th, 3:00 PM Location: We meet on top of a small hill East of the Linha d'Água café in Jardim Amália Rodrigues. I'll be wearing a pinkish t-shirt and we'll have a ACX MEETUP sign close to us Coordinates: https://plus.codes/8CCGPRJW+V8 Group Link: https://www.lesswrong.com/groups/iJzwL2ukGBAGNcwJq Notes: For comfort, bring sunglasses and a blanket to sit on. There is some natural shade. Also, it can get quite windy, so bring a jacket. (Location might change due to weather) PORTO Contact: Alexei Andreev Contact Info: alexei[period]andreev[plus]acx[a t]gmail[period]com Time: Saturday, October 11th, 11:00 AM Location: Largo Alexandre Sá Pinto 44, B2 4050-027 Porto, Portugal Coordinates: https://plus.codes/8CHH593G+CF4 Group Link: https://www.reddit.com/r/slatestarcodex/comments/1ml92xy/meetup_in_porto_portugal_on_october_11th/ Notes: Please RSVP if you're planning to come so we can plan lunch. You have to go inside the inner courtyard. From there go to the opposite corner of the garden and up the black stairs.
Inline links: https://plus.codes/8CCGPRJW+V8, https://www.lesswrong.com/groups/iJzwL2ukGBAGNcwJq, https://plus.codes/8CHH593G+CF4, https://www.reddit.com/r/slatestarcodex/comments/1ml92xy/meetup_in_porto_portugal_on_october_11th/
Contact: Alexei Andreev Contact Info: alexei[period]andreev[plus]acx[a t]gmail[period]com Time: Saturday, October 11th, 11:00 AM Location: Largo Alexandre Sá Pinto 44, B2 4050-027 Porto, Portugal Coordinates: https://plus.codes/8CHH593G+CF4 Group Link: https://www.reddit.com/r/slatestarcodex/comments/1ml92xy/meetup_in_porto_portugal_on_october_11th/ Notes: Please RSVP if you're planning to come so we can plan lunch. You have to go inside the inner courtyard. From there go to the opposite corner of the garden and up the black stairs.
Inline links: https://plus.codes/8CHH593G+CF4, https://www.reddit.com/r/slatestarcodex/comments/1ml92xy/meetup_in_porto_portugal_on_october_11th/
Highlights From The Comments On Fatima
October 24, 2025 · Original source
A nun stated that some people had seen “something” appear in the sun in Torres Novas, also about 12 miles away, though she is not really clear on whether she saw it herself or is just relaying other people’s impressions. I continue to be confused by a pattern in which we have one or two secondhand testimonies from entire towns that supposedly witnessed a dramatic miracle. Ethan then proceeds to make the situation tougher for himself, describing two witnesses from 120 km and 160 km away. But a 160 km circle includes three big cities - Porto, Coimbra, and Lisbon - along with many medium-sized towns and small villages. When we combine this with the evidence from Ghiaie - where it was witnessed from distant Tavernola but not equally-distant Milan - I think these testimonies are more consistent with a few suggestible people saying “Oh, a cool miracle? Yeah, I definitely saw it too” than sightlines that spread through normal geography. I think people were more likely to say this if they were close (and so it was plausible) than if they were very far away (and so it was less plausible), but that this is some kind of gradually declining function, rather than the sharper function you would expect if there were an actual boundary. (one person in central Germany, about 500 miles away, claimed to see the Ghiaie miracle - I didn’t include this on the original post, because it didn’t seem credible, but I think it’s good evidence that sometimes people say non-credible things) I do continue to be confused by the Alburitel stories, which seem much stronger than the others, and perhaps by the Minde story, which is at least in the right place. 4: Heat I don’t think this made it in the post, but during a conversation Ethan answered one of my objections - that any heat warm enough to dry clothes in Fatima would have started fires and explosions closer to the source - by saying that unlike the light (which was visible omnidirectionally), the heat was a ray shot straight at Fatima, which didn’t affect anywhere else. I admit this answers my objection. I won’t even ask for a complexity penalty here, because it makes sense that a just God would try to avoid frying random villages. 5: Ending One objection I raised to Ethan’s not-the-real-sun story was that, when the miracle ended, the fake sun would either have to disappear, or remain in the sky long enough to be seen alongside the real sun. But witnesses reported neither of these two things. Ethan reports one witness who says they saw a fake sun first leave from, then merge with, the real sun. I have that witness statement too - it’s on my list of weirder testimonies that don’t mesh with everyone else’s. The large majority said they only saw one sun. If most people had seen multiple suns, we wouldn’t be having this discussion. If I understand Ethan correctly (which I might not, I’m having trouble interpreting this passage), he thinks that maybe the clouds cleared enough to reveal the real sun right as the fake sun moved into the same position as the real sun, the crowds were temporarily blinded, and the fake sun took advantage of this to disappear unnoticed. 5.2: Later Miracles I claimed that later miracles were obviously not objective-in-consensus-reality. For example, the Benin City sun miracle was seen by people in one field, but not in the rest of the surrounding city of 1.5 million people; the Lubbock sun miracle was seen by something like 50 - 75% of attendees. I said that this suggested the Fatima miracle wasn’t objective either. Ethan objects that there is no reason the different miracles should be implemented the same way, and that maybe Ghiaie was a unidirectional beam of light focused away from Milan, and that maybe Benin City was entirely subjective, but Fatima was omnidirectional and objective. I of course cannot disprove the possibility that God implements the same miracle in different ways at different times; the most I can do here is ask for a complexity penalty. 5.3: Domingos Pinto Coelho DPC was a lawyer and statesman who saw the miracle at Fatima, wrote an article about it, and dropped at the end that the next time he’d encountered similar weather conditions he’d tried staring at the sun again and seen the same miracle. I described it as a powerful testimony in favor of the illusion/hallucination/suggestion hypothesis. Ethan says that “the Portugese historian Costa Brochado cast doubt on the integrity of this report”: The articles of Dr. Pinto Coelho in A Ordem seem to be very much exaggerated. It is difficult to understand the manifest confusion he establishes between the phenomena at Fatima… and the alterations in solar light that he says he saw in Lisbon some days afterward. But in any case the historical value of the articles of the leading Catholic organ is almost nil… We believe that we can declare, after patient research on the matter, that the articles of Dr. Pinto Coelho ought to be read from a political point of view, since their objective was, as the author himself came to declare, to serve as the devil’s advocate As far as I can tell, this is just a historian named Costa Brochado saying he doesn’t believe Coelho. I don’t know why we should trust Costa Brochado, but since we’re bringing in random historians’ unsupported assessments of Coelho’s honesty, here is Father Stanley Jaki: Nobody could doubt that he [DPC] was a man of utter veracity, a point to which no proper attention has been paid in the Fatima literature. There he is all too often ignored and when not, he is dismissed as someone who had an axe to grind on behalf of Church authorities wary of Fatima…in view of Coelho’s unquestionable probity, one has to assume that he saw, with eyes unblurred, what he claimed to have seen, a repetition of the miracle of the sun. He never retracted, however slightly, his claim. As one who in his last hours fervently invoked the help of Jacinta who he came to venerate as a saint, Coelho would have hardly lived with the knowledge that he had intentionally mislead countless readers of his in a matter that so closely involved Jacinta and the other two videntes…Coelho surely must have thought that Rather than keep calling character witnesses, I think it’s more helpful to note that we now have two more testimonies of people who saw the miracle once, then were able to reproduce it under less holy conditions. One is Case One of Nix & Apple, who describe someone who saw the miracle in Medjugorje, then went home to New Orleans and was able to see it again. The other is person #14 on my list of survey responses. I emailed him and asked him to confirm that he was claiming that he could repeat the miracle when the weather conditions were just right. He responded: Yes, exactly. Excluding sunsets, I was able to focus on the sun when it was in a cloudless area of the sky only once (after the pouring rain had just stopped); on all other occasions, the intensity of the light made it impossible to focus on the sun. With translucent clouds, focusing on the sun was easier, and the visual changes (colors, apparent movement) appeared consistently after a few seconds. Even though it wasn’t asked in the questionnaire, I have a hypothesis about the physiology underlying the phenomenon, or at least the parts I experienced. Thinking back to those experiences, I might hypothesize that the intense white light of the sun caused the simultaneous formation of afterimages of different colors in the same area of the visual field. It could be that the visual system, in the presence of conflicting signals, instead of integrating the information by creating a white afterimage, rapidly switched attention from one color to another, creating the alternating colors. If this process occurs unevenly across the afterimage area, different parts of the area will change color at slightly different times, creating the appearance of movement within the area itself. I think the reason this phenomenon is not very common is because there is a narrow window between “light too bright to stare at the sun” and “light too dim for the alterations to appear.” The reason I was able to get these results repeatedly was because I was trying to replicate them, so whenever I saw translucent clouds, I tried to conduct the experiment. With clouds that were too thin I failed, but with clouds that I believe belonged to the Stratus translucidus or Altostratus translucidus category, I succeeded. I would have agreed with this earlier, but it’s awkward to have so many people who say they’ve seen this in a completely clear sky. Very speculatively, there might be some individual variability in the ability of the eye to adjust out brightness, and different people will reach their sweet spots in clouded vs. clear skies. 6: “God is not a man, that He should lie, nor a son of man, that He should change his mind.” Speaking of complexity penalties, I have a broader objection to some of the moves Ethan is making here. If I understand his theory correctly, it goes like this: the miraculous object at Fatima was not the sun. But God put a lot of effort into tricking people into thinking that it was. Even though the object was below the clouds, He made the clouds clear around it at the moment of its appearance, so that it looked like the clearing clouds had revealed a normal above-the-clouds sun. Then, when it was time to remove the object, He made it disappear at the exact moment that the real sun came out behind clouds, so that the crowds would be too dazzled to notice that the object and the sun were two different things. This leaves a bad taste in my mouth, for two reasons: God shouldn’t try to trick people.
Inline links: Nix & Apple