AZR...
My friend, your 'knife' is coated with chemicals that are made from petroleum, and the meat is made from naturally occurring proteins, and fats. That there could be commingling is a virtual certainty.
The rubber in the tire is a product of organic chemistry, the mastic is composed of basic chemicals found in the same lab, and the paint alkyd resin. If the Titanium 'knife' has been ground at the bench, it may have donated ground Titanium to the applied paint.
There was elastomeric debris covering the runway, that is the nature of runways.
BEA said only that the elastomer on the Titanium was consistent with Goodyear rubber, not that it was proof that the Titanium had entered the carcass of BTSC's tyre. With possible proof available, the forensics are untried and the result is insufficent, unsatisfactory.
I think a test should have been done, rather than being so easily satisfied that Titanium from CAL sliced the tyre.
It suggests satisfaction at a low threshold, that a preconceived theory was proved by the presence of material that is found all over the runway, as well as in the GoodYear #2.
Were the tyre remnants rubber only, or complete through and through sections of the tyre to include fabric?
See you next time?