Deliberations of the members ordinarily are not subject to disclosure. See Mil. R. Evid. 606. Unsound reasoning by a member, misconception of the evidence, or misapplication of the law is not a proper basis for challenging the findings. However, when a showing of a ground for impeaching the verdict has been made, members may be questioned about such a ground. The military judge determines, as an interlocutory matter, whether such an inquiry will be conducted and whether a finding has been impeached.