So here's a few questions that I've had difficultly with but I think I know the answer now:
Does Elasticsearch integrate into Lucene at all?
Does Lucene integrate into Elasticsearch at all?
Does Elasticsearch operate on top of a "stock" version of Lucene?
I have found a lot of information that blurs the relationship between Elasticsearch and Lucene. I would like to confirm my understanding that Elasticsearch uses Lucene at it's core, but does not actually have it's own unique version Lucene that it maintains.