Complex sentence: There are many variants of empiricism, positivism, realism and common sense being among the most commonly expounded but central to all empiricist epistemologies is the notion of the epistemologically privileged status of sense data.
Split into simpler sentences: There are many variants of empiricism, positivism, realism and common sense being among the most commonly expounded. But central to all empiricist epistemologies is the notion of the epistemologically privileged status of sense data.