Some of the most expensive fighters such as the US F-14 Tomcat, F-15 Eagle, F-22 Raptor and Russian Su-27 were employed as all-weather interceptors as well as air superiority fighter aircraft, while commonly developing air-to-ground roles late in their careers.
The health service measures that best predict subjective health status should be identifiable. Following her further degree in clinical epidemiology and biostatistics, her interest turned to the development of methods to measure subjective health status.
Distinctions between objectivity and subjectivity lie at the heart of debates and conflicts in philosophy, morality, journalism, science, and more. Very often objective is treated as a vital goal while subjective is used as a criticism. Objective judgments are good; subjective judgments are arbitrary.