"A demon being summoned" - a ritual performed by at least 3 people with the purpose of "summoning" a demon or several demons. It can be ironic or use a slightly different terminology.

Resolves Yes, if an attendee of either camp reports this has been the case. If possible, more potential witnesses will be asked.

Resolves No, if after asking one or several attendees, the question will be answered negatively by all of them.

If there are conflicting reports, the matter will be investigated further, but depending on the circumstances, it may resolve N/A (if some are definitely sure it did happen and some are sure of the opposite) Yes (if the reports of the negater/s can be explained by their unawareness of the summoning) or No (if the affirmer/s are exposed as liars).

It can also resolve N/A if no witnesses are found, neither camp happens, a ritual with conflicting interpretations happens, and in other ambiguous cases.