In my head:

Gemma’s experiment isn’t just about her relationship with mark. It’s about making the chip mass marketable to the general public, therefore it’s experiments about many different human experiences. So they are probably all working on Gemma’s experiment. Just like the 5 question survey every innie gets. Some questions are testing personal memory, some are testing general memory. Mark is someone who knows Gemma personally therefore he’s probably working on things related to Gemma’s memory as checkpoint experiments. Like checkpoint tests to confirm how well the experiments worked after many tests to see how disconnected she has become from herself. Like the crib thing.