That can definitely feel confusing, but it is possible for a manually written intro to get a high AI score. AI detectors like the one explained in what AI detection scores mean look at patterns, structure, and word choices that statistically match common machine-generated text. If your writing is very clear, evenly structured, and free of personal quirks, the algorithm might flag it as “AI-like” even though you wrote it yourself. These scores are probability estimates, not proofs, so they should be taken with caution rather than as definitive evidence of AI use.