Code is often considered a source of truth in the computer science space because it is the definitive representation of how a system operates. Here's a detailed summary with timestamps to explain why code holds this esteemed position:

1. Direct Representation:
- "The code is the source of truth, the papers and everything else, it's a high level summary" 02:40:49.
- This highlights that while academic papers and documentation provide overviews, the actual code directly dictates the system's functionality.

2. Necessity of Familiarity:
- "And you're not as familiar with that as you used to be. And so I would say maybe there's some like insecurity there" 02:40:35 - 02:40:38.
- This suggests that being intimately familiar with the codebase reduces uncertainty, underscoring its role as the most reliable reference.

3. Inseparability from Function:
- "At the end of the day, you have to read code. It's impossible to translate all that code into actual paper form" 02:40:56 - 02:40:59.
- This illustrates that no matter how comprehensive external documentation may be, it cannot capture all the nuances and specifics contained in the code itself.

By understanding these points, one can appreciate why code is often seen as the ultimate source of truth in the tech world.