An indefinite article can trigger a presupposition
the verdict
SUPPORTED
the evidence backs this
confidence 87/100
Certain indefinite noun phrases and indefinite subjects can carry or trigger existential presuppositions.
Evidence for · 2
Indefinite subjects in Durban Zulu
2014 · cited by 90
Paper [6] demonstrates that certain indefinite noun phrases (such as preverbal indefinite subjects in Durban Zulu) carry a presupposition of existence.
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More for · 1
The Role of Presuppositionality in the Second Language Acquisition of English Articles
2010 · cited by 39
Paper [9] discusses how presuppositional indefinites interact with article choice and acquisition, noting contexts where indefinites are linked to presuppositions.