zlacker

>>iafish+(OP)
I wonder what is the closest thing to Cyc we have in the open source realm right now. I know that we have some pretty large knowledge bases, like Wikidata, but what about expert system shells or inference engines?

>>mepian+pe
Err…OpenCyc?

>>gumby+yj
Yep. And it may be just a subset, but it's pretty much the answer to

"I wonder what is the closest thing to Cyc we have in the open source realm right now?".

See:

https://github.com/therohk/opencyc-kb

https://github.com/bovlb/opencyc

https://github.com/asanchez75/opencyc

Outside of that, you have the entire world of Semantic Web projects, especially things like UMBEL[1], SUMO[2], YAMATO[3], and other "upper ontologies"[4] etc.

[1]: https://en.wikipedia.org/wiki/UMBEL

[2]: https://en.wikipedia.org/wiki/Suggested_Upper_Merged_Ontolog...

[3]: https://ceur-ws.org/Vol-2050/FOUST_paper_4.pdf

[4]: https://en.wikipedia.org/wiki/Upper_ontology