The discussion highlights a common observation among readers of popular science books: the initial chapters are often accessible, while later sections become significantly more complex. This complexity is attributed to the inherent need for mathematical understanding in advanced topics, which pop science authors typically avoid due to editorial constraints. The conversation emphasizes that while language can be used to explain concepts, it often falls short of conveying the depth that mathematics provides. Some participants argue that using analogies can effectively bridge the gap between familiar and new concepts, showcasing a deep understanding of the material. The debate touches on the challenges of defining "understanding" itself, suggesting that comprehension often relies on a network of interconnected concepts rather than a straightforward explanation.