Beliefs drive our actions, even when they're about unknowable things. Whether or not something is random is unknowable, so belief is all we have. We may disco

Beliefs drive our actions, even when they're about unknowable things. Whether or not something is random is unknowable, so belief is all we have. We may discover tomorrow that events which we previously thought were random, like the timing of a single atom's radioactive decay, are actually perfectly predictable. If we believe that such a discovery is unlikely then we might trust radioactive decay as an entropy source, and if we believe its very likely then we probably won't.