In Michael Crichton's "The Lost World," the phrase "Absence of proof is not proof of absence" serves as a critical reminder about the nature of evidence and belief. It emphasizes that just because something cannot be seen or proven, it does not mean that it does not exist. This concept plays a significant role in the characters' exploration of unknown territories and their encounters with creatures thought to be extinct. The characters grapple with the limitations of scientific proof, highlighting how humanity often dismisses possibilities based solely on the lack of observable evidence. This theme encourages readers to keep an open mind about what lies beyond current understanding, emphasizing the importance of exploration and inquiry in science and life.

In Michael Crichton's "The Lost World," the phrase "Absence of proof is not proof of absence" serves as a critical reminder about the nature of evidence and belief.

This concept plays a significant role in the characters' exploration of unknown territories and their encounters with creatures thought to be extinct.