The highlighted phrase functions primarily as an emphatic expression of negation or disbelief. The repetition intensifies the rejection of a proposition or possibility. For instance, in response to a suggestion, one might employ this construction to firmly dismiss the idea.
The use of such forceful denial can be significant in various contexts. It can serve as a powerful rhetorical device to underscore a strong conviction or to emphatically close off a line of inquiry. Historically, similar constructions, employing repetition for emphasis, have been used in literature and public speaking to convey certainty and conviction.
