When one has only a single cup — should it be used for Havdalah first or birkat hamazon first?

Synopsis

The Mechaber details a complex scenario where one has only a single cup with exactly a revi'it of already-diluted wine and cannot obtain another. The resolution depends on whether birkat hamazon requires a cup.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

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