Deja vu has an exact opposite, jamais vu: Why the familiar can suddenly feel completely new

Ever felt a familiar word suddenly look alien? That's jamais vu, the opposite of déjà vu, where recognition briefly falters. Researchers explain this fleeting disconnect between memory and perception, often triggered by repetition or fatigue. While usually harmless, frequent occurrences might warrant medical attention, offering a glimpse into our brain's intricate familiarity processing.