Persistent context
Memory decay
Memory decay is the deliberate weakening or expiry of what an AI system retains about a person, so that older and less consequential context loses influence over time. It is designed forgetting: a way of keeping a system current with who someone is now rather than who they were.
Also called forgetting in AI systems, graceful forgetting
Total recall sounds like a feature and behaves like a defect. People change their minds, recover from bad periods, drop old preferences, and say things they do not mean. A system that weights a remark from two years ago as heavily as one from this morning does not know the person better; it knows an outdated composite of them and mistakes it for the present.
Human memory decays, and the decay is not a bug in it. Forgetting is part of how a relationship stays current, how old frictions stop mattering, and how someone is allowed to become different from who they were. Systems that retain everything remove that possibility from the relationship.
The design question is what decays and how. Decay by age alone is crude, because some things stated once should persist indefinitely and some things restated weekly should not. Decay driven by whether context still proves useful is harder to build and closer to right.
Why it matters
Without decay, a persistent system slowly becomes an archive of a person’s worst days, and the person has no way to grow out of their own record.
Where TAICU stands
TAICU treats forgetting as a designed behavior with its own requirements rather than as a storage limitation to be engineered away, and considers what a system should refuse to retain to be as substantive a question as what it should recall.
Common questions
- Should AI systems forget things on purpose?
- Yes. Designed forgetting keeps a system current with who a person is now, prevents an old remark from conditioning years of future interaction, and limits how much of a person accumulates in a record they never agreed to.
- What is the difference between deletion and decay?
- Deletion is an event, usually requested by a person, that removes a record. Decay is a continuous property of the system: influence fades on its own, so the default drifts toward the present rather than toward the archive.