This is so, painfully, childish. Humans have known for thousands of years that there is no objective truth. Every falsity can be bent and twisted until it is more true than the sun itself.
You really think Hume was the first one to think of this in hundreds of thousands of years of human history? As a very easily findable counter example, you have Al-Ghazali who came up with this several hundred years prior.
Your reading comprehension is painfully childish. You're conflating my point of "telling the truth" with objective truth.
I was talking about lying. i.e., facing accountability for your actions and not going out of your way to deceive others. Dissonance between what you believe and what you express. Being honest. I think that was fairly clear.
> Every falsity can be bent and twisted until it is more true than the sun itself.
Objective truth is relative to its grounding. The solution to 1 + 1 is 2 in arithmetic is objectively true within that system. It's also objectively true that you are not Elon Musk. Some systems have no or few axioms and are mostly a matter of fashion, but it's not relevant to what I'm talking about.
Both you and the GP are demonstrating the REAL problem, when you resort to insults: ego/pride.
"Mater malum superbia est" (Pride is the mother of all evil), as the medieval Roman Catholic Church knew. Buddha agreed, independently, calling for a reduction of the self to nothing. Jews called it out in Proverbs 16:18: "Pride goes before destruction, a haughty spirit before a fall". Hindus denigrate the "Illusion of Separateness", which is the narcissistic urge.
Lies are not the root of all evil. Why lie? Ego. Honesty requires humility.