Zhihu Hot List
Latest recorded position: #14 on Jul 19, 2026, 8:00 AM CST.
There are not enough retained observations to calculate a rank change.
How do you rebut the claim that biologically forgetting someone takes 7 years, but since 7 is prime, you can never fully forget them?
怎么反驳「生物学上忘掉一个人需要 7 年，可 7 是质数除不尽也忘不掉」这段话？
ThreadEast first recorded "How do you rebut the claim that biologically forgetting someone takes 7 years, but since 7 is prime, you can never fully forget them?" on Jul 19, 2026, 8:00 AM CST. It has been observed on Zhihu Hot List, with less than one hour between the first and latest recorded appearances.
What the trend data tells us
The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.
This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.
Original evidence
Source listings
#14Source metric: 113 万热度
Original source