In this task, you will be shown a sentence, and you should determine whether it is overruling or non-overruling. In law, an overruling sentence is a statement that nullifies a previous case decision as a precedent by a constitutionally valid statute or a decision by the same or higher ranking court which establishes a different rule on the point of law involved. Classify your answers into overruling or non-overruling
--------
Question: insofar as those cases hold that the testimony of a witness given at a former trial, and read at the instant trial, because of the nonavailability of the witness cannot be impeached by contradictory statements made subsequent to the former trial, or by statements made prior thereto but where the impeacher clearly shows that he had no knowledge of such contradictory statements, they are, and each of them is, overruled.

Answer: overruling


Question: no such authority is required to be shown in cases involving the forgery of a check and the contrary holding in fain v. commonwealth is overruled.

Answer: overruling


Question: in so holding, we recede from our decision in koch v. kimball

Answer:
overruling