The maps on evidentiality contain a few inaccuracies regarding the languages of the East Caucasian / Nakh-Daghestanian family.
Map 78A. Coding of Evidentiality
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Lak is classified as having "No grammatical evidentiality", while it has both an indirect evidential tense form and clitics marking hearsay and inference (Friedman 2007), i.e. a "Mixed system".
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Archi is classified as having a "Verbal affix or clitic", while it has an indirect evidential perfect and several derived unwitnessed tenses (Tatevosov 2001) (= "Part of the tense system"), as well as a reported speech clitic (-er), which can function as a quotative (marking an utterance as being a quote, often embedded under a verb of speech) or as a reportative, indicating that a statement is based on hearsay (Kibrik 1977: 231-232) (= "Verbal affix or clitic"). So in my opinion, it should be classified as having a "Mixed system" as well.
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The inclusion of Batsbi as having a mixed system on the other hand is questionable. I cannot be sure what this classification is based on, since the dataset does not reference specific forms, but to my knowledge, Batsbi features only one type of marking, which can be interpreted as either "Part of the tense system" or "Verbal affix or clitic".
According to (Holisky & Gagua 1994), who are also cited by the author, evidentiality in Batsbi is expressed with two distinct affixes (-lo and -no) marking unwitnessed events. Each affix attaches to specific tenses to form their unwitnessed counterparts. They could be construed as verbal affixes, since they are distinct affixes that contribute a specific meaning, rather than repurposed tense forms such as perfects turned unwitnessed pasts, as is the case in other related languages. At the same time, they are part of the tense system, and at least one of them (-no) plausibly originates from the development of the perfect tense.
(There is also a clitic used to mark quoted utterances (aino). Possibly, it can be used as a hearsay marker on occasion, similar to -er in Archi, but that remains unclear.)
Map 77A. Semantic distinctions of evidentiality
- For some reason, Batsbi is classified as distinguishing "Direct and indirect" evidentiality, while there is no mention of direct marking in the cited source (Holisky & Gagua 1994).
References
Friedman, V.A. 2007. 'The expression of speaker subjectivity in Lak (Daghestan)'. In: Zlatka Guentchéva & John Landabaru (eds.) L’Énonciation médiatisée II, 351—376.
Louvain/Paris/Dudley MA: Peeters.
Holisky, D.-A. and R. Gagua. 1994. 'Tsova-Tush (Batsbi)'. In: Riek Smeets (ред.) The indigenous languages of the Caucasus. Volume 4. Part 2, 147—212. Delmar NY: Caravan Books.
Kibrik, A.E. 1977. Opyt strukturnogo opisanija arčinskogo jazyka. Tom II Taksonomičeskaja grammatika [The structural description of Archi. Volume II Taxonomical grammar]. Moscow: Izdatel'stvo Moskovskogo Universiteta.
Tatevosov, S.G. 2001. 'From resultatives to evidentials: Multiple uses of the perfect in Nakh-Daghestanian languages'. Journal of Pragmatics 33(3). 443—464.