Pointing out hypocrisy (the tu quoque fallacy or ad hominem attack) targets the arguer rather than the substance of the claim, meaning it does not logically invalidate the soundness of the argument itself.
In formal logic, the validity or soundness of an argument depends on the relationship between its premises and conclusion, not on the personal conduct or perceived hypocrisy of the person presenting it (making accusations of hypocrisy a logical fallacy, specifically tu quoque or ad hominem). Papers 6 and 9 directly discuss how attacks on a person's behavior or consistency are logically irrelevant fallacies rather than valid refutations of an argument's soundness.