There is a rule of thumb about "acting on a specific intelligence item." If it is about 80%+ completed in terms of relevancy, most people would usually run with it. ... No intelligence stays static for a long period of time. ... Depending on the setting, the rate of change becomes a pertinent factor. ... Generally, most people do not spend any time estimating the risk/reward for using a certain type of intelligence. ... They go with their gut instinct.