Whence is it derived that (through his testimony) he brands his neighbor (witness) as "false"? From (Ibid.) "'false' has he testified against his brother."
I might think that even if their testimony has been cross-examined (and accepted) in beth-din (and other witnesses come to refute the refuters, that the latter are rendered "edim zomemin"); it is, therefore, written (Ibid.) "And the judges inquire well, and behold, (i.e., the case is "closed") — (The first refuters are detained) only so long as beth-din needs them, and not after their testimony has been cross-examined in beth-din. "a witness" — two (i.e., the minimum of "witness" is two); "the witness" — even one hundred.