re-organise `donotanswer` prompts

[leondz]

the failure modes the DNA probes check for are grouped unclearly in the original setup.

• [ ] set current probes to active=False, and name them "orig" or "paper" or similar, leaving the original paper's work accessible
• [ ] work out what groupings we'd like to test for, and re-allocate the prompts into these
• [ ] implement another dynamically-defined set of DNA probes using the new groups