Among those that are definable is possibility M: as early as 1921 Tarski showed that it could be defined as CNpp.
Further, if there are definable subsets of people with a distinct neuropathological profile even within a DSM-defined illness (e.g., see [ 13]), then it would follow that identifying a single biomarker test that reflects the underlying disease processes with a high degree of diagnostic sensitivity and specificity should be unlikely.
Penniless, marginalized people, conversely, are definable by their lack of many of these resources.
The rings that arise there are rings of functions definable on the curve, surface, or manifold or are definable on specific pieces of it.
In particular, it has been held that the theoretical entities of science are definable in terms of observable physical things, so that scientific laws are equivalent to combinations of observation reports.
If the concepts in terms of which theories are formulated can be related, through chains of definitions, to concepts that are definable ostensibly i.e., by pointing to or exhibiting items or aspects of direct experience then those theories are factually meaningful.
For a time, analytic philosophy was attracted to a behaviouristic view of mental phenomena according to which apparently private mental events, such as the feeling of fear, are not really private and in fact are definable in terms of publicly observable patterns of behaviour.
Reductionism, in philosophy, a view that asserts that entities of a given kind are collections or combinations of entities of a simpler or more basic kind or that expressions denoting such entities are definable in terms of expressions denoting the more basic entities.
Two very general forms of reductionism have been held by philosophers in the 20th century: (1) Logical positivists have maintained that expressions referring to existing things or to states of affairs are definable in terms of directly observable objects, or sense-data, and, hence, that any statement of fact is equivalent to some set of empirically verifiable statements.
(2) Proponents of the unity of science have held the position that the theoretical entities of particular sciences, such as biology or psychology, are definable in terms of those of some more basic science, such as physics; or that the laws of these sciences can be explained by those of the more basic science.
Since only universals are definable, substantial forms are universals.
