Concerned citizen: The mayor, an outspoken critic of the proposed restoration of city hall, is right when he notes that the building is outdated, but that the restoration would be expensive at a time when the budget is already tight.
Conclusion
I respectfully disagree.
rephrase: The city should restore city hall.
Evidence
The mayor opposes restoration on financial grounds, saying we cannot afford it.
But the building is the last remaining link to the city's founding, and preserving a sense of municipal history is crucial to maintaining respect for the city government and its authority.
Evaluate
When we see rebuttal arguments on Flaw, we look out for Ad Hominem and Unproven vs. Proven False, but neither of those seems to be happening here.
However, does our author honestly grapple with the mayor's objection? The mayor said we can't afford to do the restoration because it would be expensive and the budget is very tight right now.
Our author is introducing reasons we'd want to restore city hall: it connects us to our founding days and preserves a sense if local history that helps maintain respect for our city government.
The mayor would probably say,
When the citizen says, , she's implying "we can't afford not to restore city hall".
Does she mean, "It's not financially possible to not-restore city hall?" No, that's illogical. Not-restoring city hall costs no money. So how would that be financially impossible? She must be saying "we can't afford not to" in some non-monetary way. Like, .
Goal
Since the mayor was saying "can't afford to restore" in the financial sense of budget limitations, whereas the citizen is responding to that by talking about a non-financial sense of "can't afford not to restore", we could accuse the author of committing the famous (but rare) Equivocation flaw.
She is definitely shifting the meaning of a key term in the argument.