When you are losing your case based on the factual information provided, argue the law.
When you are losing your case based on the law, argue the facts of the matter.
If both the law and the facts are against you, hammer your fist on the table and accuse your opponents of the very worst motives you can imagine.
And if Joe McCarthy had the worst motives you can imagine, then you are on very thin ice indeed.
When my son was in high school (government school) he wondered why his American history teacher would spend five days ripping on Joe McCarthy. It seemed ridiculous to him when so many other historical topics were just breezed by or ignored
Then he figured it out. The democrat-run schools want to show kids it’s uncool to suspect that communists could be devious.
I’m still proud of him.