It is common to respond to a person who is exhorting us to change our behavior by drawing attention to that person’s own behavior.
Conclusion
It's irrational to respond to someone who is imploring us to change our behavior by drawing attention to that person's behavior.
Evidence
Whether or not someone heeds their own advice is irrelevant to whether or not we should heed their advice.
Evaluate
This doesn't seem like an argument that will lend itself well to writing an algebraic recipe, but if we tried it might look something like this:
Background: It's common 3when people want us to do X for us to do Y. Premise: But Y is irrelevant to whether or not we should do X. Conclusion: So this response is irrational.
In a more general sense, we could say that the argument is saying .
If the biggest drunk in town is telling you that you drink too much, don't say, "Oh, yeah? Well you drink even more!" Instead, just assess whether it's really true that you drink too much.
Goal
Let's look for an argument saying that our typical response to X is inappropriate/irrational, because our response is technically irrelevant to how we should respond to X.