TechCrunch AIApr 20, 2026Apr 21, 2026, 07:00 JST1 min read

A specific sentence construction has become such a telltale sign of AI-generated content that it now reliably identifies synthetic writing.

3 Key Points

The phrase structure 'It's not just X — it's Y' appears so frequently in AI-generated text that it serves as a near-guaranteed indicator of machine authorship
This linguistic pattern has evolved from a potential clue to an almost certain marker of synthetic writing
The overuse of this construction demonstrates how AI language models develop recognizable stylistic fingerprints that differ from natural human writing patterns

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