But a normal web search already has this trait, which is presumably how you ended up on the garbage site in the first place. If you eventually found your result, a more narrow search can help you re-find it a few months down the road.
Yeah indeed, just full-text search can let you end up with a lot of garbage.
This is why it is so important, that you can search for various other "vague memories" to narrow down your search.
What you often remember about an article is stuff like: Did I bookmark it, when did I visit it, did I like/share/cite it on social media
You can already filter by time, tags, domains, bookmarks, and soon also if you liked/shared or even seen it in your newsfeed, or on a friends wall, on Twitter and Facebook.
We gradually expand it so you can search with as much of your associative memories as possible.