Signal staleness is one of the three ways a field’s signal access fails, and often the hardest to notice because nothing looks broken: the data was accurate when gathered, the model ran correctly, and conditions have simply moved on. The result is governing from yesterday’s map — acting confidently on a picture of reality that has expired.
Its two siblings
It sits beside two other failure modes worth naming separately, because each needs a different fix. Signal exclusion: the relevant reports cannot enter the informational field at all — the channel is closed or absent. Signal distortion: the reports enter, but the existing categories cannot represent them, so they arrive flattened into something they are not. Staleness is the temporal one, and it is close to the heart of the function — the reason informational permeability insists a model stay continuously updatable rather than merely visible. It is also the map-side cousin of ontological drift: fidelity asks whether the form still corresponds to what matters; staleness asks whether the map still corresponds to the territory. See Signal Access.