Hodges' Model: Welcome to the QUAD: 'Common Knowledge' c/o Steven Pinker

Hodges' model is a conceptual framework to support reflection and critical thinking. Situated, the model can help integrate all disciplines (academic and professional). Amid news items, are posts that illustrate the scope and application of the model. A bibliography and A4 template are provided in the sidebar. Welcome to the QUAD ...

Monday, October 20, 2025

'Common Knowledge' c/o Steven Pinker

Steven Pinker's latest book When Everyone Knows That Everyone Knows...: 

is subtitled: Common Knowledge and the Mysteries of Money, Power, and Everyday Life.

It is 'common knowledge' that caught my attention. In health care we seek common knowledge on several levels:

person (patient, client) 🠜🠞 healthcare practitioner (whatever their training)
carer - guardian  🠜🠞  healthcare practitioner
person / carer  🠜🠞 team

If we think about the referral processes, interfaces, gateways that people have to negotiate on their way to the above, you see how hard-won common knowledge is.

Critically, the knowledge may be 'common' but how accurate is it?

For the team common knowledge is essential to ensure safety, understanding and continually assessing risk.

In healthcare (and education) for person-centredness we take note of what data is available, but simultaneously begin with a blank sheet. ...

Individual
|
      INTERPERSONAL    :     SCIENCES               
HUMANISTIC =========================  MECHANISTIC      
 SOCIOLOGY  :    POLITICAL 
|
Group



When Everyone Knows That Everyone Knows:
'Sometimes, though, private knowledge can no longer be contained even if it is desirable; sometimes something is so evident that it does not even need words to express it. The presidential debate brings to mind a joke Pinker tells about a man in the Soviet Union arrested by the KGB for handing out leaflets, which turn out to be blank sheets of paper. "What is the meaning of this?" they demand. The man replies, "What is there to write? It's so obvious!"' Kelly, p.9.
 


Pinker, S. (2025). When Everyone Knows That Everyone Knows...: Common Knowledge and the Mysteries of Money, Power, and Everyday Life. New York, NY: Scribner.

My source: Jemima Kelly, Life&Arts, FTWeekend, 20/21 September 2025. p.9; and BBC Radio 4 Start the Week - https://www.bbc.co.uk/programmes/m002k37y

Image source: https://stevenpinker.com/