Meaningful silence differs from a lack of recorded disagreement.
Suppose a decision is announced in one gathering but other qualified scholars never hear of it. Their lack of objection cannot show agreement. Likewise, immediate silence while a scholar is still considering a matter does not establish settled assent.
If a ruling becomes sufficiently known, a reasonable opportunity to object exists, and no objection follows, silence may become meaningful evidence. This distinction prevents an unsupported claim that everyone agreed.