the ability to understand why something happened or how it could have been prevented after the event has occurred

retrospect

a person's written account of her or his life or experiences

record of experiences

(an) ability to keep facts in the conscious mind and to recall them at will; the part of a computer in which information is stored

ability to hold in the mind

a request to return (especially to an ambassador)

remembrance

the act of recognizing or being recognized

identification, acknowledgment

remembered experiences (spoken or written)

account

looking back at past events etc

afterthought