So the adage: his truth, her truth, THEIR truth and THE truth ... Is why we need judges, juries, mediators, policy, procedures, critical conversations Trust..and dare I saw....instant replay cameras ; ) utilized to get as close as possible to THE TRUTH.
Also in the space of an event/occurance there are multiple perspectives. Perspectives drive personal reality.
Example: 4 ppl witness a soccer match from 4 different locations near the field.
From those 4 you may get up to 4 different accounts of what occurred during the game...all of which have some level of truth. But just because 2 of the 4 describe different things doesn't mean theyre being untruthful...it May simply mean their vantage point and perspective had an impact on what they observed.