Claim: Personal Knowledge Management practiced as epistemic infrastructure — not productivity tool — is an effective counter-strategy to epistemic power concentration (PR-00005) and knowledge isolation (PR-00007). Argument Style: Abductive / strategic. This argument reasons from observed problems to the best available counter-strategy. The conclusion is a strategic claim, not a logical necessity. Argument: 1. Epistemic power concentration (PR-00005) operates by controlling what becomes visible, relevant, and credible — through algorithmic curation, platform gatekeeping, and the structural privileging of certain knowledge forms. 2. Knowledge isolation (PR-00007) operates by producing a cognitive environment in which people receive information but do not synthesize, connect, or interrogate it — leaving them dependent on the curation of external actors. 3. Both problems share a root: the absence of a personal epistemic infrastructure that the individual owns and controls. 4. PKM practiced as epistemic infrastructure means: maintaining a personal knowledge base in formats you own (plain text, open standards, self-hosted), actively connecting ideas across domains, writing to synthesize rather than to publish, and treating your own knowledge-making as legitimate and valuable. 5. This directly counters epistemic power concentration: when your thinking happens in your own infrastructure, it cannot be unilaterally restructured by a platform owner. 6. This directly counters knowledge isolation: the Zettelkasten principle (Luhmann) — thinking is relational, ideas grow through connection — restores the participatory and perspectival knowing that Vervaeke identifies as the foundation of meaning-making. 7. PKM as epistemic sovereignty is not solipsism — it is the precondition for genuine participation in shared knowledge. You can only contribute meaningfully to collective understanding from a position of epistemic independence. 8. The scalability objection: most people will not maintain a PKM system. This is true. But those who do model an alternative epistemic practice that can spread — through documentation, tools, teaching, and example. Prefigurative epistemology. 9. Therefore: PKM practiced as epistemic infrastructure is the most available and personally scalable counter-strategy to epistemic power concentration and knowledge isolation, even if it is not a population-scale solution without further structural change.