Stoic News

By Dave Kelly

Wednesday, February 14, 2024

A Representation of Stoicism in a Propositional Logic Form

I prompted Claude.ai to convert the following texts (see link below) to propositional logic form.


[The followng are the titles of excerpts and full messages sent to the ISF by Grant C. Sterling.]

Pared to their most basic level, the Stoics say:
The heart and soul of Stoicism
The vital heart of Stoic doctrine
Stoicism is the theory that:
Imagine someone says,
System S says:
I receive impressions.
Core Beliefs
Core Stoicism


Claude.ai returned the following:

"The Stoic View: Changing False Judgments to Eliminate Emotions"

1.  Eudaimonia ↔ (Virtue ∧ Joy)
2.  Control(Virtue)
3.  Control(Joy)
4.  ¬Control(Externals)
5.  Good(Virtue)
6.  Evil(Vice)
7.  ¬Good(Externals)
8.  ¬Evil(Externals)
9.  Emotion ↔ Belief(Value(Externals))
10. ¬Value(Externals)
11. ¬Emotion ¬Belief(Value(Externals))
12. Virtue → ¬Belief(Value(Externals))
13. Joy → ¬Belief(Value(Externals))
14. ∴ Eudaimonia ↔ (¬Belief(Value(Externals)) ∧ Virtue)


The key claims are:

Eudaimonia consists of both Virtue and Joy (psychological contentment) 2-4. Only Virtue and Joy are in our control, not externals 5-8. Only Virtue and Vice have genuine value, not externals 9-11. Emotions are caused by false beliefs about the value of externals 12-13. Virtue and Joy require correct beliefs about the lack of value of externals
Therefore, Eudaimonia requires correct beliefs about externals lacking value, and Virtue.

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