 In addition to clarifying the structure of our semantic understanding, the 2D framework can help justify specific conceptual analyses. The criteria that implicitly guide our everyday use of a term are often embodied in recognitional or inferential dispositions rather than in consciously accessible rules. Indeed, Jackson likens grasp of reference-fixing criteria for particular expressions to our ability to recognize the grammaticality of sentences in one’s own language (2000). Just as linguists can construct a grammar for your language on the basis of your judgments about the acceptability of particular sentences, you can construct an analysis of the meaning you associate with an expression on the basis of your application of a term to hypothetical cases. The correct analysis must capture the full range of your confident judgments involving the target expression, while abstracting away from performance errors and other interfering factors (Jackson 1998a, 31–37).