Final answer:
An allusion is an indirect reference to another work or text without explicitly naming it. In this case, the reference to Dr. Mengele can be considered an allusion.
Step-by-step explanation:
An allusion is an indirect reference to another work or text without explicitly naming it. In the given question, the reference to Dr. Mengele can be considered an allusion. Dr. Mengele was a notorious Nazi physician known for his cruel experiments during World War II.
By referencing him, the author is making a connection to his actions or character traits to enhance the understanding or meaning of the text.