Quote (NetflixAdaptationWidow @ 6 Oct 2023 06:41)
"They lied before so they are incapable of telling the truth"
is about as low of an IQ take as you can have. In fact, it's an example of ad hominem that was literally used in one of my intro to philosophy books. Make the argument based on the merits.
There are 3600 pages of arguments based on the merits in a thread next to this. Long and short ones. Bona fide and ad hominem.
Enjoy.