あの人の名前がどうしても___ません。
Q. Which verb means 'can't recall (a memory)'?
Translation
I just can't remember that person's name.
Explanation
思い出す is retrieving a memory; its potential negative 思い出せません means 'can't recall'. 覚える is committing something new to memory, so 覚えません would mean 'won't memorize'.