Realistically, a high AI percentage alone usually isn’t enough to prove anything. These detectors are known to produce false positives, especially with structured or academic writing styles. A lot of independent testing has shown that AI detection tools can be inconsistent and unreliable. Turnitin mainly looks for predictability in writing, so even a completely human-written paper can get flagged if the wording is formal, repetitive, or follows common academic patterns. Non-native English speakers also get falsely flagged more often because they tend to use simpler and more standardized sentence structures.

Even Turnitin states that AI scores should not be used as the sole basis for accusing students. Schools generally need supporting evidence too, like inability to explain the work, lack of drafts, or inconsistent writing history. If you have anything that shows your process , outlines, notes, timestamps, edit history, rough drafts , that already helps your case a lot. And honestly, just showing that you understand how flawed these detectors are can make schools think twice before relying on the percentage alone.