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I show that the classical coin tossing experiment involves two distinct definitions of probability, one ontological (the relative frequencies of initial deterministic states) and another empirical (the relative frequencies of observations). In quantum theory, I argue, only the latter definition can be invoked, since a single superposition state can give rise to multiple observation experiences. This difference explains why the present statistical quantum mechanics is an ontological dead end, despite its enormous pragmatic success. To get at the ontological content of quantum theory, I propose that the observations themselves can be interpreted on a different footing, without reference to determinate detector states. [ABSTRACT FROM AUTHOR]

We present an overview on some of the critical aspects of foundations of Quantum Mechanics, ranging from the concept of Realism to non-locality, random choice, macro-objectivation issue etc. [ABSTRACT FROM AUTHOR]