We can come to understand that people who adhere to accuracy and sincerity are sometimes not rational, at least in a utilitarian sense. For example, if a reporter attempts to seek the truth, doing so might harm her and lead to bad outcomes. From a purely utilitarian perspective, if people only follow benefits and pursue their own interests, then in many circumstances, maintaining illusions or complying with the common sense of a certain culture becomes the safer choice.
Yet, as humans, we still have a tendency to pursue the truth and feel terrible about lying, even when it costs us. This demonstrates that the pursuit of truth and accuracy is not instrumentally rational; it is a stable and autonomous function of our agency. An honest person does not primarily consider interests but speaks autonomously according to what they genuinely believe.
This is one reason we trust language: language concerns both what we say and what we believe. It seems Williams believed that while we often think honesty stems from rationality, the reality is that rationality stems from honesty. The reason we humans can engage in complex rational activities is that, at a fundamental level, we have a stable commitment to honesty, accuracy, and sincerity.
If everyone treated the pursuit of truth purely as having instrumental value, we could simply adjust our truth-seeking based on personal interests and our position in social structures. However, if that were the case, it would be difficult to explain how public knowledge systems accumulate over time. The history of science and law would become mere strategic outcomes rather than genuine progress.
The pursuit of truth occasionally requires us to fiercely hold on to what we believe. While this may seem unwise in specific situations, without this commitment, we would lose the very structure of rationality. In postmodern discussions regarding power structures and standpoints, we might expose social frameworks, but doing so does not automatically generate normative guidelines about what accuracy and sincerity should be. Because of our fundamental inclination toward truth, we gain the intellectual freedom and structure needed to understand social structures and history in the first place.
If we abandon the pursuit of truth, we lose the freedom to critique and the possibility that anything could ever become more accurate. From this perspective, the pursuit of truth and accuracy does not come from suddenly grasping some pre-existing metaphysical structure. Rather, it is about deeply understanding history, society, and humanity itself. Truth is what manages to survive across human history.