The author does not provide any counter evidence. Instead, the author reinterprets the evidence already given in support of the cause-and-effect relationship.

The additional evidence is the recent studies about hormonal changes associated with stress. The alternative interpretation is the author’s view that possibly the hormonal changes cause both the acne and increased consumption of chocolate.

The author does not appeal to authority. The author does not suggest that their hypothesis is to be believed only because it is based on science or scientific studies.

The author does not mention any well-established facts that are inconsistent with the position that eating chocolate causes acne. We cannot assume the recent scientific studies and good evidence the author points to are well-established facts.

The author’s does not provide a counterexample. An alternative explanation is not the same thing as a counterexample.