Sentinel QA Notes — Muse Batch 28

Reviewed: 2026-03-24
Verdict: NEEDS_FIXES
Files reviewed: 5
Files with issues: 2 (batch-28-savings-rate-more-important-than-returns.md, batch-28-how-to-avoid-lifestyle-creep.md)

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✅ Files That Pass Clean

| File | Words | Frontmatter | CTAs | Notes | |---|---|---|---|---| | batch-28-how-to-invest-in-your-50s.md | 1,388 | ✅ | ✅ valueofstock.com | IRS limits correct ($23,500 + $7,500 = $31,000; $7,000 + $1,000 = $8,000). SS FRA/reduction/delay rules all accurate. | | batch-28-what-is-target-date-fund.md | 1,396 | ✅ | ✅ valueofstock.com | TDF AUM figure ($3T+) plausible. Vanguard/Fidelity ER figures accurate. No bad claims. | | batch-28-pay-off-debt-while-investing.md | 1,473 | ✅ | ✅ valueofstock.com | Fed credit card rate "above 20%" ✅ accurate per G.19. Debt avalanche/snowball framing correct. |

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❌ Issues Requiring Fixes

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FILE: batch-28-savings-rate-more-important-than-returns.md

Issue 1 — ARITHMETIC ERROR (High Severity)

Location: Section "The Math That Changes Everything"

What the article says:

"what if Investor A managed to find a strategy that returned 12% annually instead of 8%? After 20 years, they'd have about $537,000. Impressive — but still $144,000 behind Investor B"

What the math actually gives:

• Investor A: $7,000/year ($583.33/month), 12% annual rate, 20 years, monthly compounding
  → FV = $577,066 (not $537,000)
• Investor B: ~$681,000 (as stated — plausible with annuity-due assumption)
• Correct gap: $681,000 − $577,066 ≈ $104,000 (not $144,000)

The article understates Investor A's 12% result by ~$40,000 and overstates the gap by ~$40,000.

Fix: Replace:

"they'd have about $537,000. Impressive — but still $144,000 behind Investor B"

With:

"they'd have about $577,000. Impressive — but still roughly $104,000 behind Investor B"

Note: The directional conclusion is still correct (more saving beats higher returns), just the specific numbers need updating.

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FILE: batch-28-how-to-avoid-lifestyle-creep.md

Issue 2 — MINOR ARITHMETIC DISCREPANCY (Low Severity)

Location: Section "Real Examples of the Cost of Upgrading Too Early" — food upgrade example

What the article says:

"That extra $400/month, invested for 20 years at 7%, becomes over $212,000."

What the math gives:

• $400/month, 7%/year compounded monthly, 240 months
  → FV = $208,371

The article overstates by ~$3,600. Saying "over $212,000" is inaccurate; "over $208,000" or "roughly $208,000" would be correct.

Fix: Replace:

"becomes over $212,000"

With:

"becomes roughly $208,000"

Issue 3 — MINOR UNDERSTATEMENT (Informational, Low Severity)

Location: Same section — apartment upgrade example

What the article says:

"$700/month more — $8,400/year. Invested at 7% annually, that $8,400 per year becomes over $116,000 in ten years."

What the math gives:

• $700/month, 7%/year compounded monthly, 120 months
  → FV = $121,159

The article says "over $116,000" but the true figure is $121,159. The claim is technically true (it IS over $116K) but understates by ~$5K. Consider updating for precision.

Fix (optional): Replace:

"becomes over $116,000 in ten years"

With:

"becomes over $121,000 in ten years"

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Global Checklist Summary

| Check | File 1 | File 2 | File 3 | File 4 | File 5 | |---|---|---|---|---|---| | SEO frontmatter complete | ✅ | ✅ | ✅ | ✅ | ✅ | | 1,200+ words | ✅ (1,314) | ✅ (1,379) | ✅ (1,388) | ✅ (1,396) | ✅ (1,473) | | No fabricated stats | ⚠️ minor math | ❌ fix needed | ✅ | ✅ | ✅ | | No stock-pick advice | ✅ | ✅ | ✅ | ✅ | ✅ | | No guaranteed returns | ✅ | ✅ | ✅ | ✅ | ✅ | | CTAs → valueofstock.com | ✅ | ✅ | ✅ | ✅ | ✅ | | Coherent prose | ✅ | ✅ | ✅ | ✅ | ✅ |

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Priority Fix Order

1. High priority — Fix $537,000 → $577,000 and $144,000 → $104,000 in batch-28-savings-rate-more-important-than-returns.md
2. Low priority — Fix $212,000 → $208,000 in batch-28-how-to-avoid-lifestyle-creep.md
3. Optional — Update apartment example from "over $116,000" to "over $121,000" in batch-28-how-to-avoid-lifestyle-creep.md