IF, for example, a broad (which they are) control question on their polygraph was "Except for the times we discussed, have you ever spanked DeOrr?", to which they answered "no", produced a high physiological reaction, which would be indicative of lying, Bowerman may have decided to pursue that by asking for people who have observed the parents' interaction with DeOrr to come forward. And, as the polygraph test continued with the relevant questions, about if they know what happened to DeOrr and where he was, were also answered "no", but those answers did NOT cause any significant rise in physiological reactions (because they truly DON'T know), that would, IMO, cause the total polygraph test results to be inconclusive. This is based on what I have read at the links I have previously posted on this thread. Also, keep in mind, that an answer of "no" to the broad control question would not necessarily mean they had, in fact, previously spanked DeOrr, but could be the result of their concern over the question itself and how it might portray them, and that concern could also cause the same physiological reaction, even though they truly HAD never spanked DeOrr (except any times that were disclosed during the Pre-test interview). JMOO, of course.