This paper develops a phenomenological ontology of objecthood centered on alternation. Its phenomenological thesis is that an object appears as one only through structured perceptual, temporal, bodily, practical, mnemonic, anticipatory, and intersubjective transitions. Its ontological thesis is more cautious: objecthood, as objecthood, is best understood as dynamic relational individuation rather than static self-presence. Alternation is returnable transition: distinguishable phases are held tog
