Astral Codex Ten

Martin

4 min read

Martin

Article

Martin is a recurring person in the Astral Codex Ten archive, appearing 3 times across 3 issues between March 30, 2024 and September 12, 2025. The archive places it in contexts such as “Contact: Martin”; “Martin, Greenwood, and Morris wrote”; “one of Martin, Greenwood, and Morris’ proposed tests”. It most often appears alongside John, 200 Degrees, Aachen.

Metadata

  • Category: People
  • Mention count: 3
  • Issue count: 3
  • First seen: March 30, 2024
  • Last seen: September 12, 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.

Spring Meetups Everywhere 2024
March 30, 2024 · Original source
ESBJERG, DENMARK Contact: Martin Contact Info: martinpetersen64[dot]mp[at]outlook[dot]dk Time: Saturday, April 20th, 10:00 AM Location: Meetup will be at a café named Bean Machine, at Kronprinsensgade 99, 6700 Esbjerg - Outside the Café there will be a little sign with "ACX Meetup" written upon it - and an additional sign will be at the relevant table. Coordinates: https://plus.codes/9F7CFCFX+G4 Notes: I will be there from 10 o'clock in the morning If noone shows up I will be gone by 2 in the afternoon. After 2 the café will close. But there is place right next to the café named Spiritusklubben where the meetup can be continued or we might go to my private home nearby depending on what we feel like.
Inline links: https://plus.codes/9F7CFCFX+G4
AACHEN, GERMANY Contact: Martin Contact Info: acxac[at]enc0[dot]com Time: Saturday, April 6th, 7:00 PM Location: At Cafe Papillon, table will have an ACX sign. Coordinates: https://plus.codes/9F28Q3JH+8G Group Link: https://t.me/+IiFfbpWDWm1kOGQ6
Inline links: https://plus.codes/9F28Q3JH+8G, https://t.me/+IiFfbpWDWm1kOGQ6
BERLIN, GERMANY Contact: Milli Contact Info: acx-meetups[at]martinmilbradt[dot]de Time: Sunday, May 26th, 2:00 PM Location: Big lawn at the center of Humboldthain Coordinates: https://plus.codes/9F4MG9WP+36 Event Link: https://www.lesswrong.com/events/A4ZYjHFnvMkifTxzf/berlin-acx-meetups-everywhere-spring-2024 Group Link: https://www.lesswrong.com/groups/MGAtkuYmX3hZ6eeaw
Inline links: https://plus.codes/9F4MG9WP+36, https://www.lesswrong.com/events/A4ZYjHFnvMkifTxzf/berlin-acx-meetups-everywhere-spring-2024, https://www.lesswrong.com/groups/MGAtkuYmX3hZ6eeaw
Meetups Everywhere 2025: Times and Places
August 29, 2025 · Original source
Contact: Martin Contact Info: acx[at]enc0[dot]com Time: Friday, October 10, 06:00 PM Location: Papillon, usually on the top, I'll bring a sign Coordinates: https://plus.codes/9F28Q3JH+8G Group Link: https://t.me/+QeSVhF1cIggzZDgy
Inline links: https://t.me/+QeSVhF1cIggzZDgy
Contact: Milli Contact Info: acx-meetups[a t]martinmilbradt[period]de Time: Saturday, October 11th, 2:00 PM Location: Big lawn at the center of Humboldthain Coordinates: https://plus.codes/9F4MG9WP+36 Group Link: https://t.me/+2-6QId-rIOczNWIy
Inline links: https://plus.codes/9F4MG9WP+36, https://t.me/+2-6QId-rIOczNWIy
Contact: Carlo Martinucci Contact Info: carlo[period]martinucci[a t]gmail[period]com Time: Saturday, September 27th, 3:00 PM Location: Prato della valle, fountain in the middle, south side Coordinates: https://plus.codes/8FQH9VXG+8J
Inline links: https://plus.codes/8FQH9VXG+8J
Your Review: The Synaptic Plasticity and Memory Hypothesis
September 12, 2025 · Original source
As formalized by Martin, Greenwood, and Morris in a 2000 review paper, the synaptic plasticity and memory hypothesis (SPM) claims:
Inline links: 2000 review paper
Criteria from Martin, Greenwood, and Morris for evaluating the SPM hypothesis. But they really just boil down to necessity and sufficiency. Is a synaptic weight change necessary for an animal to learn or memorize something? If a mouse receives a shock (a common stimulus in fear conditioning experiments), could we in principle look inside its brain and find synaptic weights that encode the memory of that shock? If we found such weights, could we modify the memory, or even generate an entirely new fake memory, by perturbing them?
Inline links: fear conditioning
Kandel doesn’t say, probably because he wrote his textbook (remember: 1976!) before the SPM hypothesis supplanted the more general plastic change hypothesis. But Martin, Greenwood, and Morris do comment on this in the introduction to their paper. They reference long-term potentiation (LTP), the phenomenon that increases in synaptic weights can be maintained on a time scale of minutes to months, which was only discovered in mammals in the late 1960s and early 1970s. LTP was given its modern name in 1975, just one year before Kandel’s textbook was published.
Inline links: long-term potentiation, 1975