{
  "fictional": true,
  "unit": "Constructed account sets; LinkedIn does not provide a complete list of silent viewers through ordinary post analytics",
  "observedExample": {
    "A": [
      "P1",
      "P2",
      "P3"
    ],
    "B": [
      "P2",
      "P3",
      "P4"
    ],
    "C": [
      "P3",
      "P4",
      "P5"
    ]
  },
  "sameCountsFullOverlap": {
    "A": [
      "P1",
      "P2",
      "P3"
    ],
    "B": [
      "P1",
      "P2",
      "P3"
    ],
    "C": [
      "P1",
      "P2",
      "P3"
    ]
  },
  "sameCountsNoOverlap": {
    "A": [
      "P1",
      "P2",
      "P3"
    ],
    "B": [
      "P4",
      "P5",
      "P6"
    ],
    "C": [
      "P7",
      "P8",
      "P9"
    ]
  },
  "expected": {
    "sumOfPostReaches": 9,
    "exampleUnion": 5,
    "lowerBoundFromCounts": 3,
    "upperBoundFromCounts": 9
  },
  "limitation": "Set arithmetic exercise, not an export of viewer identities. Estimated/rounded platform metrics add uncertainty; scope and clocks must match before even these bounds apply."
}