Several pages can repeat the same Mars Market address while relying on one original post, making apparent agreement weaker than it looks.
Trace repeated wording
Compare dates, authorship and distinctive phrases to identify shared origins.
Near-identical text usually indicates propagation, not multiple independent observations.
Separate evidence paths
Count separately maintained records only when they show their own dates and review methods.
Two sources are more useful when each can explain how it reached its claim.
Describe confidence proportionately
Use careful language when the available sources depend on a common origin.
A smaller but independent evidence set can be stronger than a large copied list.