Oh, gods the papers I wrote on this. I think I still have my 128 page thesis somewhere around. I could email it to you.....
Mostly, I think truth is just the idea agreed by the majority at a given time. (And the general majority agrees that 'truth' is a fact that has been verified,websters) The 'truth' is part of your perspective, your side of the issue, and so 'truth' is a flexible human notion that will be what it will be.
...That sounded better in my head. And made sense too. Really.
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Tell all the truth but tell it slant,
Success in circuit lies,
Too bright for our infirm delight
The truth's superb surprise;
As lightning to the children eased
With explanation kind,
The truth must dazzle gradually
Or every man be blind