· 6 min read
My best CRO win was +25%. The retest said minus 14%.
A quiz-flow test came back +25%. I wrote it down as a win. Someone re-ran it later and got minus 14%. Nothing broke — I just treated one run as a fact. Here are the four numbers that changed how I read every result, and the skill I built to stop a CRO program from believing its own wins.
