Is it a denial of due process to sentence petitioner based on a finding that she lied or minimized in her safety-valve interview?

QUESTIONS PRESENTED 1. Is it a denial of due process to sentence petitioner to additional imprisonment based on a finding that she lied or minimized in her safety-valve interview based on an agent's testimony that, although she answered every question asked, he did not "believe" her because her answers given in an un-counseled post-arrest interview by Government agents were "different.?" 2. Is it a denial of due process to deny petitioner a "safety-valve" reduction and acceptance of responsibility and sentence her to a longer sentence because she denied "other relevant conduct" that was not charged in the Information and that she did not admit?