Yes they are!
If the debris shows a certain distribution pattern of shrapnel. That is bona fide, hard, physical evidence. And if that pattern points to something other than the typical pattern of an R-27, then that rules out the R-27 with enough certainty to move on to the next likely suspect. Yup, the SA-11.
Far more convincing than your suppositions.
Originally Posted by A_Van
But until the fragments are found physically and thoroughly analysed, we can't say for sure
Seriously, you're grasping at straws. Your conspiracy has been debunked. Suck it up and go find a new method of blaming someone else.