I read that 21 Jan announcement again. Harry you need to settle down and start reading more announcements from other explorers. This is pretty standard and it's called keeping the dream alive. There might be indications (geophysics, rock samples) but the absence of proof that something doesn't exist isn't proof or even an indication that it does. I can't see where they've explained the basis for any real confidence in open areas other than the thickness increasing in certain parts of it. Even that excellent report by Matt tempers expectations on exploration potential.