Memory Half-Life
The Idea This came up while fixing a bug where stale cached data was silently injecting garbage into every outbound email for a full day. The cache never questioned itself. It just kept serving bad data. Human memory has a built-in half-life for each memory. The things you use stay strong. The things you don’t fade. That’s not a bug, it’s what keeps the signal-to-noise ratio manageable. You naturally surface what’s relevant because relevance reinforces the memory. ...