{
    "case_id": "ai-search-source-rate-20261027",
    "record_type": "one public search observation and source comparison",
    "query": "전자레인지 전기세",
    "observed_at": "2026-10-27T05:02:51.218Z",
    "environment": {
        "language": "ko",
        "region_parameter": "kr",
        "nonpersonalized_footer_observed": true,
        "scope": "One recorded result, not all users or services."
    },
    "search_url": "https://www.google.com/search?q=%EC%A0%84%EC%9E%90%EB%A0%88%EC%9D%B8%EC%A7%80%20%EC%A0%84%EA%B8%B0%EC%84%B8&hl=ko&gl=kr&pws=0",
    "observed_rate_claim": {
        "krw_per_kwh": "120.8",
        "displayed_year": "2025",
        "rounded_five_minute_cost_krw": "about 10"
    },
    "source_card": {
        "url": "https://yomar.tistory.com/entry/microwave-5min-cost",
        "checked_at": "2026-10-27T05:32:44.463Z",
        "rate_krw_per_kwh": "120.8",
        "power_watts": "1000",
        "minutes": "5",
        "energy_kwh_as_written": "0.083",
        "role": "Source card shown with AI Overview; not proven sentence-level attribution for every claim."
    },
    "current_official_comparison": {
        "url": "https://online.kepco.co.kr/PRM005D00",
        "checked_at": "2026-10-27T05:34:06.063Z",
        "contract": "주택용 전력(저압)",
        "season": "기타계절 (1.1~6.30, 9.1~12.31)",
        "first_block": "200kWh 이하",
        "energy_krw_per_kwh": "120.0",
        "scope": "Energy rate only, not total bill or a personalized incremental charge."
    },
    "independent_calculation": {
        "assumption": "1000W held constant for five minutes; not measured device consumption.",
        "energy_kwh_fraction": {
            "numerator": "1",
            "denominator": "12"
        },
        "at_120_8_krw": {
            "cost_fraction": {
                "numerator": "151",
                "denominator": "15"
            },
            "two_decimal_krw": "10.07",
            "rounded_whole_krw": "10"
        },
        "at_120_0_krw": {
            "cost_fraction": {
                "numerator": "10",
                "denominator": "1"
            },
            "two_decimal_krw": "10.00",
            "rounded_whole_krw": "10"
        },
        "rounding_note": "Use unrounded five-sixtieths of an hour; the linked article first rounds to 0.083."
    },
    "conclusion": "Agreement with a linked article, agreement with a current official condition, and arithmetic validity are separate checks. The rounded final amounts alone do not validate the input rate.",
    "not_checked": [
        "Historical 2025 tariff documents",
        "All AI services or questions",
        "Complete source attribution of every overview sentence",
        "Physical appliance measurement",
        "Individual household contract, progressive bracket, taxes and actual bill"
    ]
}