Would be impossible to reliably prove unless it absolutely fell into your lap.
I'd say typically you just take the knowledge for what it's worth and move on to the next Core 1.
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[5:57:11 PM] InfernalTater (Lewis) [Formerly TLI-Inferno]:meanwhile, Aces 'I don't always miss my destinations, but when I do, I'm on the other side of house space.'