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I'm very drunk and I intend on getting still drunker before this evening's over.
— Rhett Butler ‧ Gone with the Wind

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker plainly announces being very drunk and intending to become drunker before the evening ends. There is no excuse or apology in the wording. Its force comes from treating further intoxication as an explicit plan, expressed with an almost matter-of-fact certainty.
Context reviewed