"Relative truth is what is strongly believed by some group," said L.
"For example, at first the truth was that there were Weapons of Mass Destruction in Iraq. Now the truth is that there were no Weapons of Mass Destruction there. Twenty years from now, the truth will doubtlessly be that there were Weapons of Mass Destruction in Iraq after all."
"That there were (were not) Weapons of Mass Destruction in Iraq was strongly believed by practically everyone at a particular time, except for a few misfits. As for the misfits, the truth for them is there were (were not) Weapons of Mass Destruction in Iraq (depending upon which misfits we are talking about and at which time)."
"So Relative Truth comes down to what is strongly believed by some group at some given time."
"There is nothing else -- all truth is relative -- because there is no God's-eye point of view from which one can know with certainty, and without any limitations imposed by one's point of view, by his current and always-incomplete knowledge limiting what information he can pick up, by whatever blinkers his present conceptual framework places on him, by his previous experiences coloring everything with a particular bias, and so on. We are always blindsided by our always-narrow-to-some-extent perspectives; there is always something around the corner* that we currently do no see but is sure to upset the apple cart of whatever pathetic theories we have managed -- temporarily -- to erect."
"There is no God's-eye point of view because there is no God.** "
*Just to make the metaphor complete (not to say completely ridiculous), let's say there is a ball now rolling around the corner that is just about to cause the apple-vendor to trip, causing him to lose control of his apple-cart...
**Unlike PZ Myers, who is both a radical, fire-breathing, militant atheist and a radical, fire-breathing, militant arithmeticist, L is not a radical, fire-breathing, militant atheist. He is an atheist, yes -- he just doesn't believe in victimizing people with reason. (Yet he is not an arithmeticist, militant or otherwise -- apparently too many people have refrained from victimizing him with reason.)