The exact change
"(Actual US Uber revenue in recent years has been in the $5-8 billion range; the estimate is in the right order of magnitude.)"
"(Uber's actual reported US revenue is higher than this worked estimate, though the estimate remains in a reasonable order of magnitude. In an interview, being asked to defend your reasoning matters far more than landing on the precise figure.)"
Suggested change
Softened the claim to acknowledge the real figure is higher than the worked estimate without asserting an unsourced specific range, while preserving the pedagogical point that market-sizing exercises are evaluated on reasoning quality and order-of-magnitude accuracy, not precision.
Why this is better
Softened an unsourced specific 'actual US Uber revenue... $5-8 billion range' benchmark presented as ground truth within a worked market-sizing example, while preserving the pedagogical point that market-sizing exercises are evaluated on reasoning quality and order-of-magnitude accuracy, not precision.
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