Einstein's statistical quantum mechanics

In his lust major article published in 1936 Einstein observes that i) stationary state functions describe (however incompletely) the states of single systems and ii) a state function which is a linear combination of such stationary state functions relates to an ensemble of systems in the sense of statistical mechanics. Though much attention has been paid to the completeness aspect, the significance of associating a state function (or equivalently, probability distributions) with a single system has remained unrecognized all these 70 years. It is shown that recognition of these observations, together with his other views, leads to a statistical theory of quantum mechanics which is free from most of the controversial aspects of conventional quantum mechanics, namely: i) references to the process of observation (in the theory per se), ii) the projection postulate, iii) the particle-wave duality, iv) the uncertainty relations, v) the Schrodinger cat paradox, vi) non-locality, and vii) non-separability.