Conferences and local Circles for people interested in critical rationalism and the ideas of Karl Popper and David Deutsch. Find or organise one near you.

Joined January 2026
After an amazing launch in 2026, Conjecture Con returns to Oxford for a weekend of ideas, conversation and optimism, now at Wolfson College 📅 10–11 July 2027 🎟️ 150 seats: conjecturecon.com/events/con…
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Conjecture Conference retweeted
the @conconeurope talks are so underrated if you are into AI/philosophy/physics give them a listen
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The in-person Q&A with @DavidDeutschOxf from the latest Conjecture Conference Oxford will be premiering in 15 minutes! Watch it here: youtube.com/watch?v=YGeNzpZ5…
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Conjecture Conference retweeted
The Romance of Science Scientific endeavor is about a willingness to seek understanding in a universe that doesn't obviously care about us. ~Conjecture Institute Fellow @Sam_kuyp at @conconeurope
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Wow, we’re sold out! For everyone who can’t make it: we’re prioritizing recordings of every talk so you can watch afterwards. Still hoping to join in Oxford? Join the waitlist. We’re exploring options to expand capacity and will reach out if spots open up.
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Conjecture Conference retweeted
bringing back this gem bc europe is back thanks to @conconeurope
We’re putting on a Conjecture Conference in Europe for the first time! May 16–17 in Oxford. Thanks to sponsor @Saturn__OS and partner @ConjectureInst, join crit rats from many worlds for talks, philosophising, and a live Q&A with @DavidDeutschOxf .
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We’re putting on a Conjecture Conference in Europe for the first time! May 16–17 in Oxford. Thanks to sponsor @Saturn__OS and partner @ConjectureInst, join crit rats from many worlds for talks, philosophising, and a live Q&A with @DavidDeutschOxf .
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