I'm not 100% sure. Neither are you. Neither of us has heard the sworn testimony of those who spoke to the issue, tested in the crucible of cross-examination.
But only one of us is willing to substitute their opinion of that evidence for the opinion of those who DID hear it.
If you are not 100% sure, err on the side of life. Letting people starve to death on heresay if not okay with me. Especially when that heresay was when someone was 20 or so years old.