If unmatched, prefer local metadata. Else, DON'T

If a show is matched and an episode isn’t (e.g. like in my Parks & Rec example), and prioritise local metadata is NOT selected, will Plex match the matchable episodes to it’s TV agent, and only use the tags for the unmatched episode?

Or is it an all-or-nothing scenario? (i.e. all of them use the tags, or all of them don’t)