אִין וְלָאו וְרַפְיָא בִּידֵהּ

ביטוי (אנגלית)

He answers with yes and no, and his opinion is weak

הגדרה (אנגלית)

He answers both yes and no at once. The matter is not clear to him.

("They asked Rav Yehuda: What about the upper weight and the lower weight? He answered: 'Yes and no, and it is weak in his hand.'" - Shabbat 113a)