"So lying under oath is okay in some venues, but not others?"
I said that? Please show me where I did.
"should have told the truth or kept his mouth shut."
I pray you are never in a situation where you are under the hot lights of a zealous lawyer trying desperately to remember exactly what was said years prior.
"I pray you are never in a situation where you are under the hot lights of a zealous lawyer trying desperately to remember exactly what was said years prior"
Three words: "I don't remember".