Cosmic Yak,
One, I did not say or imply that classified evidence should be heard in open court. From what I quoted, a reasonable inference is that I think that this case should follow the example of Guantanamo, as outlined by a lawyer whom I quoted upthread. This lawyer has over twenty years of experience defending detainees at Guantanamo; therefore, he is as good a source of information as one could imagine. Two, I was not using The Guardian itself as the source of my opinions; The Guardian had the good sense to quote people with relevant experience, a practice that I recommend. I also provided comments from various British lawyers. It is tiresome to have to disavow things I did not claim in the first place.
You wrote, "Do you know this for a fact, or are you just speculating?" The antecedent of "this" is ambiguous. If it means that Ms. Begum cannot communicate with the special advocate, then I gave two citations to indicate the truth of this assertion. Please feel free to challenge this assertion with citations of your own. If it means do I know how well the special advocate performed his role, then my answer is that I do not (nor can any independent person). I did not say that he or she performed poorly; what I documented is that there is no way for Ms. Begum to indicate her position to him or her, nor a way for the evidence to be described to her. That is what makes this process less fair than Guantanamo, where such conversations can happen, within limits (see upthread).