Have some vector for a concept match a KB entry etc, IDK :).
Yes. It's something I've been working on, so there's at least 1 such effort. And I'm reasonably sure there are others. The idea is too obvious for there to not be other people pursuing it.
Not yet. It's still early days.
> What other approaches exist?
Loosely speaking, I'd say this entire discussion falls into the general rubric of what people are calling "neuro-symbolic AI". Now within that there are a lot of different ways to try and combine different modalities. There are things like DeepProbLog, LogicTensorNetworks, etc.
For anybody who wants to learn more, consider starting with:
https://en.wikipedia.org/wiki/Neuro-symbolic_AI
and the videos from the previous two "Neurosymbolic Summer School" events:
One of the immediate things I'm working on is a text to knowledge graph system. Yohei (creator of BabyAGI) is also working on text to knowledge graphs: https://twitter.com/yoheinakajima/status/1769019899245158648. LlamaIndex has a basic implementation.
This isn't quite connecting the system to an automated reasoner though. There is some research in this area, like: >>35735375
Cyc + LLMs is vaguely related to more advanced "cognitive architectures" for AI, for instance see the world model in Davidad's architecture, which LLMs can be used to help build: https://www.lesswrong.com/posts/jRf4WENQnhssCb6mJ/davidad-s-...