Frаn аnd Sаndra are sisters whо bоth recently had their first child. Befоre joining any parenting groups, neither held strong views about the safety of early childhood vaccinations--Fran thought they might be better to avoid, while Sandra thought they were probably safe. After a few months, Fran began spending time with a group of mothers at her child’s daycare who were openly skeptical about vaccine safety. In this group, members only talked about how they agreed with one another, and when someone mentioned a pro‑vaccine point, the group quickly shut it down. Because no one openly disagreed, the group came to see themselves as fully unified in their beliefs and began stereotyping pro‑vaccine parents as naïve. They didn't like to look at alternative views or information and only shared articles and videos in their text chat that supported their opinions. When Sandra later pointed out that Fran hadn’t held such a strong anti‑vaccine stance before joining this group, Fran insisted that their position was the only morally correct view. Privately, she wasn’t always sure she fully agreed with the group’s stance but it felt like she would be disrupting the group dynamic to voice her true thoughts. The dynamic of the anti-vaccine parent group that Fran was a part of in this scenario best illustrates __________.