Is, Ought and Other Barriers to Entailment

January 29, 2024 - February 1, 2024

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University of Otago

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Reminder Online Zoom Conference: Is, Ought and Other Barriers to Entailment

Philosophy Programme, University of Otago, Dunedin,  New Zealand, 

Dates Monday January 29th- Thursday  1st February

There will  be two three-paper sessions daily, an evening (New Zealand)/morning (Europe) session and a morning (New Zealand)/evening (Europe) session, each lasting three hours twenty minutes,  Papers to run for forty minutes (maximum) for the presentation, twenty minutes (minimum) for the Q&A. 


Hume famously claimed that you can’t get an Ought from an Is,  a moral conclusion from no-form non-moral premises.  Thus he seems to be proposing a barrier to entailment; a claim that you can’t get conclusions of one kind from premises of another.  This conference will be devoted to a critical examination of such claims.  Can you derive conclusions about the future from premises about the past, conclusions about the external world from premises about present impressions, general conclusions from particular premises or (more generally) substantively X-conclusions from non-X premises? And what are the philosophical consequences of such barriers to entailment  

Registration is free but prospective attendees are requested to email Dr Karen Maclean .

Programme Administrator, Philosophy, University of  Otago, at [email protected] for a Timetable (particularly important  for a multi-continental Zoom conference), a set of Abstracts and log-in details.                                  

Subject Line: Barriers Conference Registration  

 Invited Speakers (listed alphabetically)

Dr. Norbert Gratzl, and Dr Edi Pavlovic Ludwig-Maximilians-Universität, München.

Is, Ought, and Some Proof Theory

Professor Dr Catarina Duthil Novaes, Vrije Universiteit, Amsterdam 

Dialogical pragmatism and the justification of deduction 

Professor  Mark Nelson, Westmont College, Santa Barbara.

Aunt Dahlia meets the Barriers to Entailment

 Professor Charles Pigden, University of Otago, Dunedin.

Prior’s Paradox Redux, No-Ought-From-Is and the Deficiencies of Deontic Logic, Can Truth Subvert the Inference-Barriers?

Professor Adriane Rini, Massey University, Palmerston North.

Arthur Prior: From the Autonomy of Ethics to ‘The Autonomy of Ethics’

Professor Gillian Russell, Australian National University, Canberra.

Barriers to Entailment  

Professor Dr Gerhard Schurz, Heinrich-Heine-Universität, Düsseldorf

The Is-Ought dichotomy and its consequences for the value-neutrality of science

 Professor Gila Sher, University of California, San Diego

Values, Truth, and Logic: the Route from "Is" to "Ought" and "Must".

Associate Professor Sara Uckelman, University of Durham, Durham.

About the Past and About the Future: Diodorus’s Master Argument


Professors Antonella Corradini and Sergio Galvan, Università Cattolica del Sacro Cuore, Milano, Italia

Hume's Law, Normative Supervenience and Bridge-Principles 

Professor James Franklin, Sydney University, Sydney, NSW, Australia

The Worth of Persons as a Stepping-Stone from Is to Ought 

Dr Jeremiah Joven Joaquin, Department of Philosophy, De La Salle University, Manila, Philippines

Tertullian’s Entailment Barrier Thesis

Dr Andrés Luco, Auburn University, Alabama, USA

Naturalistic Fallacies and Normativity Naturalized

Professor Kevin Meeker, University of South Alabama, Mobile Alabama, USA  

Breaking Down Barriers: Humean Hints on Philosophy of Logic

Note to colleagues in the Americas 

Please note that the Morning NZ & Australia/Evening Europe sessions are likely to be the most convenient for you, but that for you they will be on the preceding days. For example. 8:00 am Tuesday 30th of January in Dunedin, New Zealand will be 1:00 pm Monday 29th January in Chicago and 4:00 pm Monday 29th  January in Buenos Aires.

Note to colleagues in Asia 

Please note that the Evening NZ & Australia/Morning Europe sessions are likely to be the most convenient for you. For example, 8:00 pm Monday 29th of January in Dunedin, New Zealand, will be 10:30 am in Tehran, 12:30 pm in Mumbai, 3:00 pm in Singapore and 4:00 pm in Tokyo. 

Note to colleagues in Africa

Since your time-zones are similar to Europe’s, we hope that most of you will be able to make both the morning and the evening sessions.

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January 8, 2024, 9:00am UTC

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De La Salle University
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