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An answer is measured outcome statistics and gate fidelity that a trivial Andreev-state model cannot reproduce.","problem_ref":null,"references":"","settled_by":"A measurement-based braiding protocol with parity readout showing the predicted statistics in a device whose topological phase is independently established.","status_note":"Microsoft reported X and Z parity measurements in a tetron device (arXiv:2507.08795, 2025), a prerequisite for measurement-based braiding; no fusion-rule or braiding statistics have been demonstrated as of 2026.","title":"Non-Abelian exchange or fusion of Majorana zero 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