Washington's 9.9% millionaires tax would tie for the fifth-highest top state rate.

1. Pass Title matches the evidence

   The title says 9.9% would tie for the fifth-highest top state rate. The ranking evidence lists California, Hawaii, New York and New Jersey above 9.9% and Oregon tied at 9.9%, so the title matches. The answer and finding (True) match the title and the claim's 'one of the five highest' wording.

2. Pass No obvious contradictions

   Key point 2 (four states and DC higher) matches the ranking and the objection response. The effective-rate figures are arithmetically consistent: 0.5M x 9.9% / 1.5M = 3.3%, 1M x 9.9% / 2M = 4.95%, 4M x 9.9% / 5M = 7.92%. The Seattle breakdown sums correctly (9.9 + 0.58 + 5 + 2.557 = 18.037), and 8.137 points of payroll tax matches key point 4.

3. Pass Plausible justification

   The conclusion explains that the rating is True because the ranking puts 9.9% at fifth, which is 'one of the five highest', and it separately says 'the highest in the nation' is not accurate. It also covers the caveats (average rate, Seattle payroll taxes, capital gains) and explains why the ranking holds at either Hawaii rate. This is a reasonable basis for the rating.

4. Pass Sources are relevant

   The Tax Foundation state rate table, the ESSB 6346 session law, the Department of Revenue capital gains notice, the Tax Foundation Seattle analysis and the three FactHub records are all on topic for the claims they support by name, title and description. All takeaways are marked not yet checked, so I did not judge whether they say what the article claims.

5. Pass Common questions answered

   The article has four objections. Each response addresses its question: the 'highest' response gives the states above 9.9%, the Seattle response breaks down the 18.037% figure, the 'average' response gives the 3.3% to 7.92% range, and the capital gains response explains the gains-only scope.

Coverage: I examined the article text only: title, claim, finding, answer, conclusion, context, key points, evidence items with summaries and limitations, the four objections and responses, sources, changelog, and the chart and dataset citations. I did not read source snapshots or the web. Every source takeaway in the input is marked 'not yet checked', and none is marked established, so I treated all source-backed statements as unchecked and did not rely on them to confirm the figures (Hawaii's 2027 13% rate, Oregon's 9.9%, the Tax Foundation figures, and ESSB 6346's 9.9% rate). Those points are left to the Source Checker. The arithmetic and internal consistency checks used only figures already in the article text.