The Truth"The truth is out there, Agent Spender." - Agent Mulder, The X-Files
What is truth? How do you know who's telling the truth? And how do you find the truth? If you want to know the truth, then your wish is granted, for there is no single truth.
Anything that involves human interpretation can have more than one truth. In other words, with exception of cold hard facts like your standing height in particular time and space, everything else can have multiple truths. Truth is what becomes of when someone observes an event and puts his own predispositions onto what he saw. Another person might have observed that same event and applied his own predispositions and that becomes another facet to the truth. If that person tells the truth to someone else, the truth mutates, as that second person understands the truth. If someone dies, then the facet of truth that he owned dies with him. If he was the only person who knew the truth, then the truth dies altogether. If not a soul had saw what happened, then there is no truth.
You might be wondering, what about science and technology? Science can most often then not tell who's guilty, but it cannot tell you everything. By means of science and technology, you are creating another facet of the truth.
Truth is a thing; it lives within us, not "out there". You can't have someone else's truth, only your own. Everyone is telling the truth, as they know it, unless they are consciously twisting the truth. If you are looking for what really happened, then that's impossible, because in the process, you will be applying your own predispositions to the event, thereby becoming another facet of the truth. So, collective truth is closest thing you will have, the truth that encapsulates all other truths, as it becomes another facet of the truth.
(Mulder's attempt to seek the truth was a futile attempt from the beginning.)