יֵאוּשׁ שֶׁלֹּא מִדַּעַת

ביטוי (אנגלית)

Despair without knowledge/ unconscious resignation

הגדרה (אנגלית)

Despair of finding the lost object when it later becomes clear that the item was lost. Figuratively: despair arising from a lack of knowledge of the true state of affairs.

("Despair without knowledge. Abaye said: It is not despair, and Rava said: It is despair" - Bava Metzia 21a)