What would you determine convincing proof?
i assume you and i are both reasonable people. let’s assume we are on a jury and the priest in question is charged with being a homosexual. the proof should be such that you and i, as reasonable people, will look at it and both agree it proves the priest is a homosexual.
examples of what is not proof would include hearsay statements from someone you know or pictures of the priest having a meal with another man. think about how you would feel if you were accused of being a homosexual based on hearsay or a picture of you having dinner with a same sex friend of yours!