If a document gives a clear informant, ask yourself:
- what information did the informant know first hand;
- what information did the informant know because someone told him;
- would there have been motivation to lie;
- what information might she have guessed the answer to.
If a document does not give an informant, ask yourself:
- was there more than one probable informant;
- who was the most likely informant;
- how likely was the informant to know the information.
Always ask yourself:
- were there any penalties for lying on the document;
- how likely was it that the informant be caught in a lie;
- was there a motivation for the informant to lie.
Inform yourself and think about the informant.