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Wait a minute. Let me get this straight. I have no life, we're all agreed on that, right?
— Phil ‧ City Slickers

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker asks everyone to agree on a sweeping judgment about his own life before continuing. Turning that bleak assessment into a shared premise makes the exchange comic as well as self-deprecating. The question sounds methodical despite the emotional weight of what it assumes.
Context reviewed