  Two results are proved at the quantal level in Sorkin's hierarchy of measure
theories. One is a strengthening of an existing bound on the correlations in
the EPR-Bohm setup under the assumption that the probabilities admit a strongly
positive joint quantal measure. It is also proved that any set of no-signalling
probabilities, for two distant experimenters with a choice of two alternative
experiments each and two possible outcomes per experiment, admits a joint
quantal measure, though one that is not necessarily strongly positive.
