[Boundless]

So if SCO claims their "deep dive" into the Linux code
found matches to SCO Unix code, we now know how that
happened.

For those just joining the story, some years into the
legal action, SCO has yet to show IBM, or the courts,
any actual instances of what they claim. Even the
judge has remarked on the absence of credible evidence.

Entirely apart from whether SCO actually has any grounds
for suing people over Unix (they apparently don't own it
- they are just licensing agents for Novell).

[ThePythonicCow]

So if SCO claims their "deep dive" into the Linux code found matches to SCO Unix code, we now know how that happened.

Well - no. I don't think this shows us how that happened. What matching code they found was mostly code that both SCO and Linux took from prior sources, under legal terms. For example, some common Berkeley networking code.