A Festival of Writers Who are Wrong on the Internet

But Striving To Be Less So

Berkeley, CA, Lighthaven: May 31 - Jun 2
What is LessOnline?

31 May - 2 June, 2024

Lighthaven Campus, Berkeley, CA

LessOnline is a festival celebrating truth-seeking, optimization, and blogging. It's an opportunity to meet people you've only ever known by their LessWrong username or Substack handle.

The goal is to bring together a "mostly-online subculture of people trying to work together to figure out how to distinguish truth from falsehood using insights from probability theory, cognitive science, and AI." [1]

The structure will be determined by you: We'll have a collaborative schedule for "unconference" sessions, where attendees can sign up to run anything they want. If you have a session or activity you might like to run at LessOnline, let us know!

If LessOnline is an awesome rationalist event,
I desire to believe that LessOnline is an awesome rationalist event;

If LessOnline is not an awesome rationalist event,
I desire to believe that LessOnline is not an awesome rationalist event;

Let me not become attached to beliefs I may not want.

      ——Litany of Rationalist Event Organizing

Some writings we love

These sites embody the virtues we want to celebrate. We're offering free tickets to everyone whose site is listed below.

This list is incomplete. You can help by expanding it.


Manifest 2024

Manifest (Fri Jun 7 - Sun Jun 9) is a festival for forecasting and prediction markets, hosted by Manifold and Manifund.

It's happening one week after LessOnline, both at Lighthaven.

So we're teaming up with Manifest to offer a discounted ticket to both events, as well as a weeklong Summer Camp in between the two.

If you'd like to pay for your Manifest ticket in mana, Manifold is offering various discounts; see their ticketing site for more details.

Buy Tickets

Tickets include (a) admission to the Lighthaven venue, (b) lunch, dinner, and snacks, and (c) many talks, workshops, and events. Housing and childcare can be purchased separately below.

Housing & Childcare

A limited number of rooms are available on-site at Lighthaven. Housing is also available during Summer Camp (Mon Jun 3 - Fri Jun 7) and Manifest (Fri Jun 7 - Sun Jun 9).

Babysitting will be available for children under 18. (Babysitting will not be available for children over 18, as the LessWrong moderators would prefer to enjoy the festival instead of doing their day jobs.)

More information about childcare forthcoming; register interest in here.

Book rooms