Cantonese (*) sentence-final particles such as lo, wo, and gwaa mark this trait of an utterance.
Some Athabaskan languages permit a form of "coercion" based on this grammatical property, according to Theodore Fernald.  A mandatory Type II system of this property exists through five verb suffixes in Tuyuca, and Tibetan modifies the copula with suffixes such as dug or yod red to mark it. Scott DeLancey distinguished "mirativity" from this linguistic property. A 2004 book by Alexandra Aikhenvald argued that this property cannot be conflated with modality, updating earlier work by Chafe and Nichols. The "quotative" was defined as a subtype of this in Roman Jakobson's notes on Balkan Slavic, which coined this linguistics term. Cantonese (*) sentence-final particles such as lo, wo, and gwaa mark this trait of an utterance. In languages such as Cherokee, hearsay can be marked using affixes that convey, for 10 points, what trait indicating how the speaker got the information in a proposition or how reliable it is?
Some Athabaskan languages permit a form of "coercion" based on this grammatical property, according to Theodore Fernald.  
evidentiality [or evidentials; accept evidential coercion; prompt on indirective; prompt on mediative; prompt on descriptive answers such as "how the speaker came to know something" or "level of (un)certainty"] 