Figure 10 of the technical report https://services.google.com/fh/files/misc/ai_augmented_textbook.pdf https://services.google.com/fh/files/misc/ai_augmented_tex

Figure 10 of the technical report https://services.google.com/fh/files/misc/ai_augmented_textbook.pdf https://services.google.com/fh/files/misc/ai_augmented_textb... has a third n=30 group labeled "LCG" that is mentioned nowhere else. It scores 100% on "I felt like today's educational tool helped me gain a good understanding of the content." so I wonder what's up with that.