nUniqueness, degree of individuation, relative singularity
nAmbiguity
nI eat a hamburger every day.
(specific, non-specific,
generic readings)
nRelated effects: mood (Spn, Frn, etc.)
nImplies the referent can be uniquely determined
nInteractions
nGiven/new status in discourse
nKnownàreferentially
accessibleàspecificà definite