Psychedelic Philosophy: Logic And What Thought It Cannot Think

Psychedelic Logic And What Thought Itself Cannot Think

When you die, does death die? What then?

From Zeno to Meno, from fractal to dactyl – the world jumps with static paradox. But is paradox possible at all without logic?

If the set of all sets includes itself, what happens to the set of all sets which do not include themselves? Does it include or exclude itself?

‘I never lie.’

Where Arjuna tried to resolve these kinds of thoughts by saying,

‘The nature of things is to have no nature; it is their non-nature that is their nature. For they have only one nature: no-nature.’

The Spanish Arab Avicenna – continuing Aristotle’s reasoning – maintained that,

‘Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be beaten is not the same as not to be beaten, and to be burned is not the same as not to be burned.’

Law of excluded middle or lore of excluded muddle*

Join us on this crash-course of “plurivalent logic”, contextualised in both the Eastern and Western traditions, with reference to the psychedelic experience.


★★★★★ Intimate, insightful, fun seminar! Mark is a great teacher and always welcomes suggestions and questions from the group. I will be attending again.

★★★★★ Amazing session. Lindsay is a great communicator and lecturer. There was a good balance between group discussions and Lindsay lecturing directly. Her passion for education and psychedelics is positively infectious. I will be attending another PS event again soon!

★★★★★ These events are always amazing. Trust me, you are going to learn something that will change your outlook.

★★★★★ Really good. Didn’t expect to like the discussion aspect but was actually incredibly useful. Saw a few, even stubborn minds changed and was certainly insightful and valuable. Thank you.

★★★★★ I had a really good time. The host was extremely knowledgeable and the talk was well paced and interesting.


Psychedelic Philosophy is a discussion group for people with an interest in exploring the philosophical issues related to the use of psychedelics. It is a lively, fun space to engage with ideas, have our preconceptions challenged, and connect with others interested in questioning what IS, and what it MEANS.

Sessions run every few weeks and include a short presentation by a facilitator, followed by structured discussion activities. Preparatory reading will be provided for those who want to do it, but homework is always optional!

Who will be facilitating these sessions?

Lindsay Jordan is a senior lecturer at the University of the Arts London, where she teaches philosophy and theory of education. She is currently researching the purpose of universities, the role of psychoactive substances as educational tools, and moral enhancement. She won the student prize at Breaking Convention 2017 for a doctoral assignment on psychedelic enquiry (, and spoke at Beyond Psychedelics 2018 on ‘What Are Psychedelics For?’ (

Mark Juhan graduated in Theology & Religious Studies from Pembroke College, Oxford and has just completed a masters in Religion and Society at St John’s, Durham. He has been a lay chaplain and is currently applying for a doctorate in psychedelic theology. He is interested in the relationship between drugs and culture, specifically the potential of augmenting religion with ritual entheogenesis. Mark has spoken at Breaking Convention 2017 on Christicisms of mystical thrill-seeking ( and at Beyond Psychedelics 2018 on a social study he has conducted (

► Please arrive early for a 7pm start

► It involves a bring-and-share supper: bring culinary goodies if you can.

For any enquiries please contact:

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Join from £5 a month and become part of this amazing community!

The space is not wheelchair accessible unfortunately. The workshop room is located on the second floor with no lift. Toilets are located on the first floor. The workshop features a slide show and might not be suitable for people with visual impairment. The workshop features talking and listening and might not be suitable for people with a hearing impairment. Please enquire with us if you have questions. This event is a sober space.

Please note that we can not offer refunds or exchanges. We do welcome swapping or reselling your tickets with people you know or on TicketSwap

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