Abstract
We re-examine the hypothesis that the Ellis-Jaffe sum-rule might hold at some low scale (appropriate to a quark model) but that the singlet axial charge rapidly evolves to zero at the scale of the EMC experiment. Not only does such an explanation generate a significant polarised strange sea, but also a polarised charmed quark sea. The latter should be clearly visible as a sudden decrease in the integral of g 1p above the threshold for charm production.
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