When a thunderous miracle is claimed, how do you tell true prophecy from spectacle, fraud, or wishful thinking? This episode traces the Polish Brethren — the Socinians — and their distinctive, rigorously rational test for authentic prophecy. We situate that test in the turbulent Reformation century: intellectual humanism, confessional conflict, courts of conscience, and print culture. Listeners will meet the key figures and institutions, and discover why Socinians treated miracles not as unquestionable signs but as claims to be weighed by Scripture, reason, and moral fruit.