kerravonsen | (Reply)

From:

but I suspect the answer is that "Bad Wolf" began and ended with Rose;

Oh, I know that, but at the point in the episode at which that bit of dialogue happened, we didn't know that -- that's why the shivver. That we find out later in the episode that BadWolf was Glowy!Rose makes sense, but it wasn't something that I anticipated, because I had managed to avoid that particular spoiler. I knew from spoilers that Rose had had an Encounter with the Time Vortex and that the Doctor died saving her from that, but I'd kind of assumed that it was an Instant!Death encounter, rather than a Godlike!Powers encounter. So I was very glad to be surprised about it.

It fell to Earth during the Time War,
That was an assumption on the Doctor's part, though. Because it was a Time War, there wasn't anything about that particular space and time that would have given more or less weight to that Dalek being a survivor of the Time War, because if it had been a survivor, the Dalek could have ended up anywhere in space and time, presumably. Wheras if it has been a descendent of a survivor of the Time War, the same anywhere-in-space-and-time could also have applied.

And the issue of contamination by human cells was new to it.

True. Which makes me wonder what would have happened in an AU universe where the Dalek had been persuaded not to kill itself, become a companion (as I know some people wanted) and then been with them when they encountered these faux-Daleks. Would its old programming of obedience to the Emperor Dalek have kicked in? Would it have been horrified by the faux-Daleks and wanted to exterminate them? Would it have been horrified by the Emperor-Worship and tried to exterminate the Emperor? (Is there a "you are defective" exterminate-the-Emperor clause in Dalek programming?)