Of course you have since your points require absolutely NO supporting evidence at all.
The jacket found was WHITE. Live with it.
It was a BRIGHT and SUNNY day and the following comparison is proof positive that the jacket appears much much lighter under BRIGHT and SUNNY conditions, so your evidence which relies on a personal interpretation of white under difficult lighting conditions is absolutely laughable!

And besides all that, the Jacket was initialed and is official evidence.

JohnM