Final answer:
In Act 3 of 'The Crucible,' Hale begins to doubt the guilt of those accused of witchcraft, notably including Proctor, due to the hysteria and weak evidence in the trials.
Step-by-step explanation:
In Act 3, Hale begins to doubt the guilt of the people who have been accused of witchcraft in The Crucible.
Hale, who initially believes in the righteousness of the court's mission, starts to see the flaws in the proceedings and the potential innocence of those accused.
He witnesses the hysteria and the weak evidence upon which the accusations are based, and he becomes particularly troubled by the proceedings against Proctor and others who he has started to view as potentially innocent.
His doubts are a critical turning point in the play as they highlight themes of justice, morality, and the abuse of power.