On the energy-time uncertainty relation. Part II: Pragmatic time versus energy indeterminacy

The discussion of a particular kind of interpretation of the energy-time uncertainty relation, the pragmatic time version of the ETUR outlined in Part I of this work measurement duration (pragmatic time) versus uncertainty of energy disturbance or measurement inaccuracy] is reviewed. Then the Aharonov-Bohm counter-example is reformulated within the modern quantum theory of unsharp measurements and thereby confirmed in a rigorous way.