Debate as Reward: A Multi-Agent Reward System for Scientific Ideation via RL Post-Training. - Moein Salimi; Babak Hosseini Mohtasham; Amin Aghakasiri; Mahdi Naieni; Amir Hossein Qeysarbeigi; Mohammad Masih Shalchian Nazer; Zahra Azar; Mahdi Jafari Siavoshani; Mohammad Hossein Rohban (CoRR, 2026)