Agreement among several reports does not prove that they originated independently. Collusion concerns intentional agreement to lie. Common-source dependence can occur even among sincere transmitters who all rely on the same initial statement.
If five newspapers reproduce the same unverified announcement, their agreement does not create five firsthand observations. Truly separate and credible sources would constitute a different evidential situation.
Tawātur therefore cannot be reduced to the superficial multiplication of voices. A sound assessment asks how the reporters learned the fact, what they shared, and whether the transmission structure really supplies independent reinforcement.