Set Harth wrote:
There can't be a Data-head in a cave in this timeline.
This is a branching timeline which diverged from the Prime in 2233. At that point Data's head was in the cave, and it didn't disappear just because Nero showed up.
But it could
disappear, just as it might not
disappear, where by "disappear" I mean never have been in that cave as it was in TNG. beamMe
's version of temporal mechanics makes at least as much sense as any other in Star Trek.
Until a movie or episode airs that settles the question canonically, the head might or might not be there.
In that sense, it's like Schrödinger's cat
, except it's Schrödinger's head
. Or Spot's head
, if you like.