Fetching posts by slug (using GROQ) will return two versions, the published one and the new draft. Is there a way to tell them apart?

If i've got a published post, and I edit it. Fetching posts by slug (using GROQ) will return two versions, the published one and the new draft. Other than the fact that the IDs for drafts have a prefix of

drafts.

is there a way to tell them apart? Essentially I want to make sure the live page doesn't return any draft versions. This is all happening in my GraphQL server with a private dataset, so all my sanity client queries have a token.

ah, looks like the prefix method is the trick:
from the GROQ docs

smoother handling of drafts in on the backlog (this filter works but is a bit verbose for a relatively common task)

can there ever be multiple drafts for a given entity?

not at the moment, that is, I guess you sort of have it in the revision history

i'm just pondering whether I can put my entire site into preview mode and avoid weird duplicates

which I suppose would also mean favouring the draft version when there are two records with the same slug