The claim states that radioactive decay is a fundamentally random quantum process with no physical precursor event. This is a foundational, standard textbook principle of quantum mechanics and nuclear physics. None of the retrieved papers specifically address the quantum mechanical nature or randomness of radioactive decay; instead, they discuss cell cycles, cancer biology, radiation in condensed matter, DNA repair, silicon spin qubits, time-series tools, quantum consciousness models, radioimmunotherapy, thermocontextuality, criminal behavior, artificial intelligence, and Bell test loopholes. Because the claim is a textbook fact of basic physics covered by everyday scientific observation and education, it falls under common knowledge.