[A] This page explains the differences between query and filtered context quite well:
When there's no need for query context (e.g. because sorting on something else explicitly) filtered context has many advantages.
[B] This page states that, "When sorting on a field, scores are not computed.":
https://www.elastic.co/docs/reference/elasticsearch/rest-apis/sort-search-results#_track_scores
This might seem to imply some of the advantages of filtered context (e.g. availability for caching) but is not conclusive / not adamantly clear.
[QUESTION]: does sorting on some field explicitly imply that all parts of the query are executed in filtered context, and if so where can I find this in the documentation / source code / some authoritative place?
Best I could find is this: How do I create a boolean "OR" filter?
but it's not very conclusive at all.