Lemain,
I think that the issue here is actually the definition of the word speculation. The Oxford English Dictionary one is: "the activity of guessing possible answers to a question without having enough information to be certain". The investigation of known potential causes (ie. currency, qualification, medical category) is not 'guessing possible answers'; the answers come from facts discovered by investigation. Therefore, I think that much of the exchanges here between you and others (including me) is because you are applying a different meaning to the word 'speculation' than the rest of us. This is not a criticism but, perhaps, speculation on my part!
I also am interested in what significance you think that radar track data accuracy has upon the conclusions in the report. Again, not a criticism but curiosity on my part because you do seem to keep returning to this issue with gusto.