Community Source Corroboration

Check community-source and independent-corroboration counts against supplied minimums.

Description

Community-source corroboration compares source and document counts with two independently supplied minimums.

Community-source corroboration compares source and document counts with two independently supplied minimums. Both conditions must pass.^[1]

Check community-source and independent-corroboration counts against supplied minimums.

When to use Community Source Corroboration

Use this tool to check community-source and independent-corroboration counts against supplied minimums.

Prepare the text, recorded observations, aligned figures or editorial criteria requested. Confirm what each label, count, timestamp or supplied flag represents before interpreting the result.

How to use Community Source Corroboration and understand its results

Prepare the text, recorded observations, aligned figures or editorial criteria requested. Confirm what each label, count, timestamp or supplied flag represents before interpreting the result.
Enter communitySources, independentCorroborations, minimumCommunitySources, minimumCorroborations using the field table and calculation rules, then run the tool.
Read communitySourceMargin, corroborationMargin, meetsBothMinimums. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
communitySources	Community sources	integer; minimum: 0	Required
independentCorroborations	Independent corroborations	integer; minimum: 0	Required
minimumCommunitySources	Required community sources	integer; minimum: 0	Required
minimumCorroborations	Required corroborations	integer; minimum: 0	Required

Enter nonnegative integer counts and minimums. Return signed margins and inclusive composite gate.

sourceMargin=sources−minimum; documentMargin=documents−minimum; passes=both≥0

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
communitySourceMargin	Community-source margin	integer
corroborationMargin	Corroboration margin	integer
meetsBothMinimums	Meets both supplied minimums	boolean

json

{
  "input": {
    "communitySources": 3,
    "independentCorroborations": 2,
    "minimumCommunitySources": 2,
    "minimumCorroborations": 2
  },
  "output": {
    "communitySourceMargin": 1,
    "corroborationMargin": 0,
    "meetsBothMinimums": true
  }
}

Limitations and assumptions

No source independence, document authenticity or factual corroboration is verified.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.

Alternative or Complementary methods

Use Roundup Source Coverage: Measure source-category coverage in a roundup. For a complementary task, use Election Reporting Coverage: Audit election-reporting topic and source-count coverage.

References

Community Source Corroboration — tool.io

Similar or alternative tools

Roundup Source Coverage
Measure source-category coverage in a roundup.
Election Reporting Coverage
Audit election-reporting topic and source-count coverage.