Proof by David Auburn is an emotional rollercoaster from start to finish. With only four characters and two acts to unfold the gripping story. The play revolves around Catherine, a genius mathematician, whose father had recently died. She struggles to understand why she was put through all the hardships of her father’s mental illness. Catherine also attempts to find some answers in, her father’s student, Hal. However, Catherine’s sister, Claire, thinks she has the same mental illness as their father. She makes Catherine feel as if she is crazy. Hal, on the other hand, makes her feel somewhat sane. She eventually learns to trust Hal and reveals a well kept secret of hers. Though Hal at first doesn’t believe her, he sooner or later comes to
