Seriality is a descriptive property of the chain, not a stand-alone authenticity test. Repetition of a statement or action may be real while one transmitter's precision, uprightness, or connection remains doubtful. Conversely, a report can be authentic without the full musalsal feature being established.
The usual criteria remain: integrity, precision, chain continuity, absence of irregularity, and absence of hidden defects. Seriality may shed light on how transmission occurred but cannot replace these requirements.
Example: Five narrators repeat a similar formula, but one has weak retention. Uniform phrasing does not automatically cure that defect; the descriptor musalsal and the report's critical grade must remain separate.