I think the word you're looking for is erroneous
ad hominem
Introducing irrelevant facts or arguments to distract from the subject under discussion is a type of logical fallacy called a red herring. This tactic is often employed to divert attention away from the main issue being debated in order to confuse or manipulate the audience.
A red herring is a fallacy where irrelevant information is introduced to distract from the main issue or argument being discussed. This diversion can lead people away from the central point and cloud their judgment. It is important to recognize and address red herrings to stay focused on the relevant facts and arguments.
This sentence is not irrelevant.The evidence is irrelevant to the case at hand.You have given me all the irrelevant paperwork.
No, because it's irrelevant.
"The facts are irrelevant in this case, your Honor!",blurted the defendant.Coloration of prepared foods at presentation is not irrelevant to its' level of appreciation by the intended consumer.
I got all this facts from this nonfiction book.
Those facts are irrelevant to this case.
"Despite the evidence presented, the facts are irrelevant in this case!"
the use of facts and reasoning to make a point
assumes fact
The key to all arguments is having logical information and facts. This will make it easier to present your case in opposition or in favor of the argument.