A lack of proof is not proof of the opposite

An original Czech argument states: “Studie neprokázala účinnost metody. To však samo o sobě neznamená, že prokázala její neúčinnost. Rozsah dat zatím nedovoluje tak silný závěr”. One learner summarizes it as a definitive demonstration that the method never works. Another treats the qualification as proof that the method is effective. A third separates an unestablished positive conclusion from an established negative finding. The task asks for a precise paraphrase and the evidence limits. No real clinical or scientific study is cited, and no recommendation about using a treatment is supplied. This passage is original language practice, not medical guidance or a quotation attributed to a researcher. The response must preserve both withheld conclusions rather than promote either one beyond the words.