Actually you're wrong again, this is another proof that your propositions don't work. He took the guns from the family's safe without the parents' permission, from what I read. And he passed the background check too. He had the guns there and they were locked and he agreed to only take them out if he told the parents. He was not supposed to have the key, only the father did. So, mental health screening wouldn't make a difference in this case again, since if he had not bought the guns for himself, he would simply use the guns from his father with the spare key he was not supposed to have. He would have access to guns one way or the other, even if he hadn't bought some of the guns himself.
And you evaded the question again.![]()
You just made a fictitious scenario to defend your argument. This is what people do when they lose a debate based on the facts. So, yes, anything is possible. If he had not passed a mental heath screening he could have fabricated a gun with a 3D printer, or an AR 15 could have fell out of the sky into his lap. There’s always a scenario someone can create but it’s not real, it’s what is called a fallacy. You’re arguing fallacies now. You might as well argue what is the point of having police if a crime is committed on the other side of the world.
In this case he used his own gun and a mental health screening would have prevented the massacre in that high school.

