The editor of a magazine has pointed out several errors of spelling and grammar committed on a recent TV program.
Conclusion
The editor can’t be trusted to judge spelling and grammar errors.
Evidence
There have been spelling and grammar errors in her own magazine.
Evaluation
So just because you committed a crime, you can’t judge whether that crime has occurred? If you’ve made a mistake, you can’t correctly judge when others are making a similar mistake? The fancy name for this Famous Flaw is Ad Hominem, which is basically when you try to invalidate the speaker of the argument, rather than the argument. The attack on the speaker is almost always about an ulterior motive or past behavior.
Goal
Look for an argument where the author says,