Definition of Testing based on TestPhaseSpace
.The atoms in the test_phase_space are data points. .The root [smallest unit] of testing is not atomic, but rather composite [comprised of atoms/ data_points]. .The smallest unit that expresses 'testing' is the testpath itself: the testpath alone determines the SUT's properties: ramification level and the peculiarities [particular interaction/s with specific data points] to be encountered. .The essence of Testing is to know the testpath under quest. And by knowing, we can then evaluate the SUT[Subject Under Test]. .Which one to know first is guided by risk-based prioritization.