A practical guide to cognitive hygiene, drawn from the NPF/CNI framework’s immunisation protocols. Six practices—Binary Belief Sorter, Proportional Scrutiny, Pattern Naming, Mode Switching, Update Log, Information Diet Check‑In—are offered as disciplines for keeping thinking flexible. The framework is a hypothesis; these are tools to try, not prescriptions.

Through the story of Alex’s investment journey, this sci‑comm essay introduces the Neural Pathway Fallacy (NPF) factors—Lazy Thinking, Special Reasoning, Neutral Pathway, Spillover—and the Composite NPF Index (CNI) as a proposed measure of belief‑network entrenchment. It then shows how protocols like the Binary Belief Protocol, Proportional Scrutiny, prebunking, cross‑training, and dopamine rechanneling can help loosen entrenched networks.