zonder labs hand-labeled ai vs human writing for clarity. in claude code replies, 27% of sentences hide who actually did what. stack overflow answers, 1%. vague wording ran about 9x stack overflow's rate too their real example from claude code: "the database readiness check sits at the user-session entry boundary, before the authentication handler runs" they also say em dashes and "delve" aren't really the problem. which tracks. the annoying part is reading a pr description three times and still not knowing what changed small samples (90 to 240 sentences per group), so grain of salt. but "user-session entry boundary" is a crime