The first-order evidence is typically associated with whatever scientists take into account when they form an epistemic attitude towards a theory. This view entails that the more theories have been discarded before T is discarded, the more justified we are in thinking that T is likely to be discarded.
Nicklesp. Fluxes in their emission were studied by trapping the neutrinos and allowing them to interact with chlorine to produce a radioactive argon isotope.
Thus Feyerabend proposed as a thought experiment that if measuring equipment was rigged up to register the magnitude of a quantity of interest, a theory could be tested just as well against its outputs as against records of human perceptions Feyerabend— But this in turn depends on the adequacy of any theoretical claims its sensitivity may depend on.
No hunches here, just solid data from countless published scientific experiments that continue to support the best explanation thus far. Scientific theories all have common characteristics which differentiate them from unscientific ideas like faith and pseudoscience.
It turns out, however, that the causal theory faces a number of conceptual problems, most notable of which is that it makes referential success inevitable insofar as the phenomena which lead to the introduction of a new theoretical term do have a cause see Psillos chapter 11 for a discussion.