djuno -jun-ju'o- gismu

x1 knows fact(s) x2 (du'u) about subject x3 by epistemology x4.

Words usable for epistemology typically have a du'u place; know how to - implying knowledge of method but not necessarily having the ability to practice (= tadjyju'o). (cf. know/familiar with: se slabu, na'e cnino, na'e fange; cmavo list du'o, cilre, certu, facki, jijnu, jimpe, senpi, smadi, kakne, birti, mipri, morji, saske, viska)

In definition:

du'o
djuno modal, 1st place (info source) authoritatively; according to ...; known by ...
sedu'o
djuno modal, 2nd place knowingly; knowing facts ...
tedu'o
djuno modal, 3rd place knowingly; knowing about ...
vedu'o
djuno modal, 4th place under epistemology ...

In notes:

birti
x1 is certain/sure/positive/convinced that x2 is true.
certu
x1 is an expert/pro/has prowess in/is skilled at x2 (event/activity) by standard x3.
cilre
x1 learns x2 (du'u) about subject x3 from source x4 (obj./event) by method x5 (event/process).
cnino
x1 is new/unfamiliar/novel to observer x2 in feature x3 (ka) by standard x4; x1 is a novelty.
facki
x1 discovers/finds out x2 (du'u) about subject/object x3; x1 finds (fi) x3 (object).
jijnu
x1 (person) intuits x2 (du'u) about subject x3; [epistemology].
jimpe
x1 understands/comprehends fact/truth x2 (du'u) about subject x3; x1 understands (fi) x3.
kakne
x1 is able to do/be/capable of doing/being x2 (event/state) under conditions x3 (event/state).
mipri
x1 keeps x2 secret/hidden from x3 by method x4; x2 is a secret; x1 hides/conceals x2.
morji
x1 remembers/recalls/recollects fact(s)/memory x2 (du'u) about subject x3.
saske
x1 (mass of facts) is science of/about subject matter x2 based on methodology x3.
senpi
x1 doubts/is dubious/doubtful/skeptical/questions that x2 (du'u) is true.
slabu
x1 is old/familiar/well-known to observer x2 in feature x3 (ka) by standard x4.
smadi
x1 guesses/conjectures/surmises x2 (du'u) is true about subject x3; [epistemology].
viska
x1 sees/views/perceives visually x2 under conditions x3.
datnynoi
n1=d1 is a report about n2=d2 from reporter n3 to intended audience n4.
jungau
x1 tells/makes known to x2 fact(s) x3 (du'u) about subject x4 by epistemology x5.
prujungau
x1 predicts/foretells/anticipates to x2 fact(s) x3 (du'u) about subject x4 by epistemology x5.
selju'o
d2 is knowledge held by d1 about subject d3 by epistemology d4.