Reference for Bava Batra 90:6

לא לעולם דאיכא עדים והוא דראה

the first ruling refers to the case where the claimant 'sees' [the article in the craftsman's possession]. What are the circumstances? If there are witnesses [that he entrusted the article to the craftsman], let him bring the witnesses and obtain possession.<span class="x" onmousemove="('comment',' Since according to you (Rabbah) the craftsman cannot plead that he returned it unless he had witnesses to that effect. ');">⁶</span>

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