The traditional approach to meaning invariance

Kathryn Parsons attempts a criticism of the traditional approach to the problem of meaning invariance of predicate expressions when a theory is replaced by a successor. I have considered three types of cases which Parsons presents as counter-examples to Fine's criterion, and find that the first two do not succeed in refuting the criterion. The third, however, does suceed; and I argue that there is no way to revise Fine's criterion in order to remove the difficulty. Hence some non-traditional approach to meaning invariance is required, or subjectivity in the science must be shown to be avoidable in spite of the incommensurability of theories.