[nmrm]

> i didn't get whether they were able to show an actual path of how UA could have occurred

I think the answer is no -- there was never a clear demonstration of an extant buggy execution trace. Just a preponderance of evidence that such a trace could exist.

[tracker1]

The lack of ECC memory means that you don't even need that... the effects of a little solar flare, or even noise from a powerline nearby could have caused the issue.

[trhway]

no. there were multiple reports of UA. Solar flare, etc... can't cause such consistency.