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A model arguing that the boundary between science and non‑science emerges from the collective practices of scientific communities over time, rather than being fixed by a priori rules. Demarcation is not a static criterion but a dynamic outcome of negotiation, exemplars, and institutional consensus. What counts as science today (e.g., big data cosmology) might not have fit earlier criteria; emergence respects history and sociology. Pseudoscience fails to gain such emergent status because it cannot participate in the communal, self‑correcting processes that produce reliable knowledge.
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