Hi, according to Scrum Guide 2020 "The moment a Product Backlog item meets the Definition of Done, an Increment is born". We all know that. And we know that it is required to produce at least one usable increment every Sprint.
But what if one of the PBIs is not releasable? What if it's just an experiment / mockup / internal PoC? There is a value in it, but it is not usable. Is it still part of the Increment?