 What endows a claim (e.g., about the value of a magnitude) with content is the web of inferences in which it is located. Such a claim has a well-defined content if many reliable inferences link it to other claims with well-defined content. It is the nature of a system’s interaction with its environment that determines which inferences to and from a magnitude claim about it are reliable. Quantum decoherence and inferentialist pragmatism work together here to make objective sense of the Born rule with no need to mention measurement: Though of course at some stage all actual measurements do involve interactions with an environment well modeled by quantum decoherence.