Final answer:
John Proctor is an independent thinker because he challenges the authority and stands up for his beliefs in 'The Crucible.'
Step-by-step explanation:
Based on the events in 'The Crucible,' it is reasonable to conclude that John Proctor is an independent thinker because he challenges the authority and stands up for his beliefs.
Throughout the play, Proctor questions the motives and actions of the Salem witch trials, openly criticizing the court and refusing to blindly follow the crowd.
For example, Proctor refuses to confess to witchcraft, even when pressured and threatened with death, because he values his integrity and refuses to conform to the expectations of the majority.