Justice Mahon had a brilliant mind. Not only was he able to understand the causes of the disaster, he was also able to identify misleading and false testimony.
I still have the original video that includes live performance in the Royal Commission. If one forgets all about the causes of the crash, just ask a few simple questions.
Why was it necessary to break into the homes of the pilots?
Why was the folder of Captain Collins' diary recovered with all the pages missing?
Some outright lies were told under oath at that commission. Why was it necessary to lie? Of course, there was a cover-up!