Complex sentence: Antidosis can be viewed as a defense, an autobiography, or rhetorical treatise but since Isocrates wrote it when he was 82 years old, it is generally seen as an autobiography.
Split into simpler sentences: Antidosis can be viewed as a defense, an autobiography, or rhetorical treatise. However, since Isocrates wrote it when he was 82 years old, it is generally seen as an autobiography.