Final answer:
Truman would struggle with the truth about his life because it would mean accepting that his entire belief system and reality was a fabrication, leading to a profound psychological hurdle.
Step-by-step explanation:
It would be hard for Truman to understand the truth about his life because his entire existence has been within a carefully constructed reality. To learn that what he believed to be true was in fact orchestrated for the purpose of entertainment would be a shocking revelation. It would challenge his sense of identity and understanding of the world, leading to feelings of betrayal, confusion, and possibly an identity crisis. Individuals inherently trust their senses and experiences to comprehend reality, so for Truman, accepting that his whole life was a fabrication would mean questioning his entire belief system, which is an extremely difficult psychological hurdle to overcome.