First of all, thank you for your hard work on this library.

Secondly, when using the library, I noticed that once the KnowledgeBase is loaded into memory,

1. after adding facts,
2. making a query
3. then adding more facts

After making a second query that is the same as the first, it returns the cached results and not the updated results.
Ideally, this should be something that is optional.
The user should be able to add new entries and get the updated entries without hitting the cache.

I have created a PR to fix this.