Using "we" in a research paper is acceptable even for solo authors, though some prefer "I" to avoid sounding pretentious. The choice between "we" and "I" can depend on personal preference and the conventions of the specific journal. In fields like mathematics, "we" is commonly used, while some authors appreciate the honesty of "I." Alternatives like passive voice constructions (e.g., "It is shown that...") can also be employed, though they may disengage readers. Ultimately, authors should choose the pronoun that feels most natural, ensuring consistency throughout the paper. Some find that "I" conveys personal responsibility, while "we" can imply a collaborative spirit or engage the reader directly.