and Hacking (HISTORICAL ONTOLOGY)

Discourse is, then, to be analyzed not in terms of who says what but in terms of the conditions under which those sentences will have a definite truth value, and hence are capable of being uttered. Such conditions will lie in the "depth" knowledge of the time. The vision leads us far from material conditions of the production of sentences. (Hacking, 79)

...attempting to understand how objects constitute themselves in discourse must be a central topic, not exactly of the theory of knowledge, but of what I would call historical ontology. (Hacking, 98)