  A universal formulation of the quantum uncertainty regarding quantum
indeterminacy, quantum measurement, and its inevitable observer effect is
presented with additional focus on the representability of quantum observables
over a given state. The operational tangibility of the framework assures that
the resultant general relations admit natural operational interpretations and
characterisations, and thereby perhaps most importantly, their experimental
verifiability. In view of the universal formulation, Heisenberg's original
philosophy of the uncertainty principle, most typically exemplified in his
famous gamma-ray microscope Gedankenexperiment, is revisited; it is
reformulated and restated as a refined no-go theorem, albeit perhaps in a
weaker form than was originally intended. The relations entail, in essence as
corollaries to their special cases, several previously known relations,
including most notably the standard Kennard-Robertson relation, the
Arthurs-Kelly-Goodman relations for joint measurement as well as the Ozawa and
the Watanabe-Sagawa-Ueda relations for error and error-disturbance.
