No need for insults, friend. It weakens your position.

But sure, if I actually need to, let me spell it out.

The statement: "He is a liar" is stronger than the statement "He is a liar who sometimes tells the truth", despite the fact that the second is more detailed. Extraneous details distract from the main argument. Also - there is almost no example in the world of someone who makes only false statements. It's a ridiculous insertion.

I hope you can understand why your suggestion above is nonsensical.