Despite an attempt to break with the hierarchical picture in traditional emergentist thought, non-standard accounts of emergence are often still committed to a premise that ontology is prior to epistemology. This paper aims to topple this last remnant of the traditional hierarchy by explicating a pragmatic view of emergence based on John Dewey’s work. Dewey argued that the traditional notion of ontology is premised on a view of existence as complete. Through a discussion of Dewey’s work it is argued that (...) this premise results in a process of reification that unduly excludes from ontology many precarious and indeterminate aspects involved both in everyday life and in philosophic and scientific inquiry. Building on a recent explication of transformational emergence the paper proposes a diachronic and non-hierarchical account of emergence, called pragmatic emergence. According to that account the relation between ontology and epistemology is a temporally reciprocal one. This means that ontological and epistemological features co-determine each other over time. Determinacy and continuity become historical features of a multitude of unfinished processes that we view from within. (shrink)