  In the quantum Bayesian (or QBist) conception of quantum theory, "quantum
measurement" is understood not as a comparison of something pre-existent with a
standard, but instead indicative of the creation of something new in the
universe: Namely, the fresh experience any agent receives upon taking an action
on the world. We explore the implications of this for any would-be ontology
underlying QBism. The concept that presently stands out as a candidate
"material for our universe's composition" is "experience" itself, or what John
Wheeler called "observer-participancy".
