I'd never heard of him but I did Google-up 5 US serial killers wiped out in jail. I do, however, suspect that Shipman and Hindley are much better known this side of the pond.

[CdM] Scientific? IN BROAD TERMS
[INJ] Specific to a single culture? NO
[Software] A human concept? YES *some discontented muttering from epistemologists*

[INJ] To be clear, if something can't be guessed with good questioning and a little googling, then I too would judge it a bad subject. I gave up on my experiment of using randomly generated topics from Wikipedia because they too often failed that test (an Estonian province comes to mind...).
[Software] Well, for some definitions of "this side" and "pond", yes. Very possibly not for my current definitions of those terms. Which was my point.

[CdM] Numbery? NO

Could we please cease to comment on the previous challenge? Thanks.

[Dujon] Learning? NO *a ripple of interest in the audience*
[Rosie] Connectivity? NO

[Chalky] Medical? KIND OF *a couple of claps from the audience*

[SW] An idea? YES, a sort of idea.

Sorry Dujon!

[Biggsy] Related to the Internet vs. Rosie's general knowledge, and which is better debate? Thankfully, NO.

Hm. Rosie's General Knowledge and The Internet. They're both rather marvellous bases for games... but which is better? There's only one way to find out!

[Rosie] Mental processes? YES! *applause*

[Dujon] Dreamtime? NO
[Rosie] Risk aversion? NO