The trouble with weasling out of this lie - is that it was "seared - seared" into his brain.
In principle I can imagine a person, any person, making a statement and then going back and correcting a date, or a time or a place. Not that they couldn't be lying, just that it's possible that they did have some detail wrong.
However, how does one get a detail wrong on something that is "seared - seared" into one's brain?
I mean there's lying and then there's lying - this dude is lying about his lying - it's starting to make my head hurt!
Then it proves that the exact opposite is true. You were never in Cambodia, certainly not on Christmas Eve, and definitely not sent there by Richard M. Nixon.
And you respond by saying that you were 'inaccurate'?