uhn observed that modern science is characterized by the bracketing of
major disagreements regarding basic assumptions except during periods of
"crisis." While pre-modern inquiry saw the contemporaneous co-existence
of fundamentally incompatible frameworks, each competing for adherents,
modern science normally excludes such divisions. Instead, modern science
is characterized by a succession of frameworks. Only at periods of
transition that are temporally bounded, for which Kuhn coined the term
"scientific revolutions," does more than one framework have currency
within a given sub-specialty (1962, 10-22).