Separate paths arriving at the same place. Convergence is evidence when the paths were truly independent.
Late Latin convergere (to incline together), from com- (together) + vergere (to bend, turn); separate paths bending toward the same place, which counts as evidence only when the paths were truly independent to begin with.
Separate paths arriving at the same place. It is evidence precisely when — and only when — the paths that arrived there never touched each other along the way.