  In this contribution to the proceedings of the 182nd Nobel Symposium, I
reflect on the concept of "discovery" as it is used by physicists and
astronomers. In particular, I comment on how the scientific community
distinguishes discoveries from propositions that are supported only by lesser
forms of evidence, emphasizing the social nature of this process and remarking
on the subjective factors that go into making such judgements. I advocate for
an approach that is intentionally Bayesian in nature, in which individuals are
encouraged to evaluate and publicly state their priors and to update them
systematically. I close by applying these practices to the case example of the
Galactic Center Gamma-Ray Excess.
