<p>Philosophers, psychologists and linguists routinely use truth-value judgments as a source of evidence for the meaning of specific expressions. This method presupposes that truth-value judgments track whether what was said corresponds with facts. However, a growing body of evidence suggests that ordinary people’s behavior on the truth-value judgment task is sensitive to a range of factors beyond correspondence with facts. In this paper, we investigate how judgments of truth are influenced by considerations of truthfulness. In a series of three experiments, we present results indicating that the truth-truthfulness entanglement is at the heart of the debate over the semantics of color predicates. We use these findings to challenge contextualism about color predicates. While our substantive contribution is quite targeted, we show that the methodological lessons are likely to generalize broadly to other areas of research in cognitive science.</p>