Spaces in the Truth

So what’s the truth?
The witness swears to tell it,
the whole of it, nothing but it,
yet lawyers seldom allow
whole truth, only censored truth.
Say what you mean,
mean what you say,
don’t say it mean. 
That’s saying the truth,
but sometimes not the whole
of it. Whose truth can you tell?
“You do not have permission
to tell anything you heard today.”
If she owns the truth, is it hers
to hold? Is it wholly hers?
If she’s mine, is part of her truth
mine?