|Humean World: a world without causality - phenomenally like our world. See also David K. Lewis, Humean supervenience, Humean mosaic.|
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Def Humean world/Lewis/Cartwright: a world that is just like ours, except that there are no causal laws in it. ((s) Therefeore there is no cause!) but all temporal sequences of events, properties, etc., and also laws of association are equal - the question what difference do causal laws make in our world is then put succinctly: is there for each possible world a corresponding Humean world? - Cartwright: No, because we are not always able to dispense with causal laws in favor of association - ((s) see above.
For the connection of laws of association with causal laws, C).
A Humean world would always be causally homogeneous - if anything increases the probability of something else, it will not be a Humean world.
How the laws of physics lie Oxford New York 1983