1. identify sources
2. assess source's reliability
3. get specifics
4. avoid vendettas
5. first-hand knowledge
6. ideological orientation
7. financial interests
8. debts and favors
9. bias of intermediaries
10. past experiences
11. psychological factors
12. internal consistency
13. external consistency
14. insider details
15. dialog and dissent
16. awareness of objections
17. nuance
18. the human voice
19. snarl/purr words
20. narrative
21. implicit bias
22. red herrings / straw men
23. fallacies
24. weasel words