The claim
Take θ ~ Beta(1, 1) and choices Z₁, Z₂ ~ Bernoulli(θ), independent given θ. Then P(Z₂ = 1 | Z₁ = 1) = E[θ²]/E[θ] = (1/3)/(1/2) = 2/3. If Z₁ is set by intervention, do(Z₁ = 1), the arrow θ → Z₁ is cut, θ keeps its prior, and P(Z₂ = 1 | do(Z₁ = 1)) = E[θ] = 1/2. A simulation of 400,000 runs gives 0.667 and 0.500.
The rise from 1/2 to 2/3 is information about θ, gained by whoever watches the first choice. Nothing in the chooser changed. So the tendency of a Dirichlet–categorical hierarchy to “reinforce” a run of selections is the observer’s learning about a fixed mixture. Self-formation, in the sense the record holds (TERM-023’s transformation; CLAIM-025’s capacity to transform the governing organization), needs the mixture itself to change because of the choice. That is a further structure, for example θ_{t+1} = F(θ_t, Z_t), and it is told apart from the observer’s learning only by intervening (CLAIM-414).
What it does not say
- That self-formation does not happen. It says this hierarchy’s reinforcement is not evidence of it.
- Anything about Jennings’s paper (LIT-1963) beyond this. The claim is the formal limit on reading its fluid-to-formed transition off observed choice sequences. The paper’s own mechanism, from Voigt 2022, is a causal update of the chosen option’s stored value (p. 25), which is the structure this claim says self-formation needs (NOTE-1508).
Note of 2026-11-03: Voigt, read
The causal update Jennings takes from Voigt is a correlational finding with a causal role imported for gaze, not an intervention (NOTE-1517). So the structure this claim says self-formation needs is proposed there, not shown. CASE-191 builds it.