doesn't this teach us something about the contextual nature of knowledge? It's not just about access to a set of facts, arguably the facts we choose to look at and how we interpret them are more relevant- whether that's a 9/11 truther choosing to look at "anomalous" facts that give them a feeling of justification for taking bold speculative leaps about the hidden truth, or a liberal who focuses on the war crimes committed by conservatives as condemnatory while they ignore or downplay when liberals have committed similar atrocities or violated international laws.
The context determines how the facts are interpreted, what weight they are given, and how they shape behavior or even beliefs. People don't just accumulate facts, knowledge and beliefs are complex, and subject to manipulation.