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Sales says Q3 revenue was $4.2M and finance says $3.7M. Both are right. What must exist before an agent answers 'what was Q3 revenue?'

Two correct queries, two different numbers, one word. The fix is two certified definitions with different names, a bridge that closes to the dollar, and a rule for what the agent does with the bare word. The tempting join returns $9.0M.

Updated Nov 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

Two correct queries, two different numbers, one word. The fix is two certified definitions with different names, a bridge that closes to the dollar, and a rule for what the agent does with the bare word. The tempting join returns $9.0M.

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FEDITOR'S NOTE

An original exercise, not a reported company interview. Score whether the candidate refuses to pick a winner, names both measures, builds a bridge that closes exactly with no plug line, and specifies the agent's behavior on the ambiguous word. Strong candidates also spot the one-to-many join that inflates bookings.

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