  The interpretation of quantum theory known as QBism argues that many elements
of the formalism have a subjective interpretation. At the same time, QBism
claims to be a broadly realist program. This implies that reality in QBism must
be somehow founded upon an agent's subjective experiences (measurement
outcomes). To make this idea more precise, we propose to interpret QBism's
"experiences" as synonymous with the concept of "perceived phenomena" in
phenomenology. This suggests an approach to ontology in which objects can only
be physically real if they are in principle observable. But what does
"observable" mean? Are atoms, electromagnetic fields, quantum states, or
probabilities observable? Here we discuss the different answers to this
question given by QBists and phenomenologists, and attempt to reconcile them.
