realis
(in grammar) A category of grammatical moods, the most common of which is the indicative mood, that indicate that something actually is, or is not, the case.
â Source: realis - Wiktionary, the free dictionary
As quoted in WALS Online - Chapter Semantic Distinctions of Evidentiality:
Because evidentials are used to describe the speakerâs involvement with events, they tend to occur in realis contexts, especially in past tense situations (cf. example (8) above).