Tammy had a full-time job in a public elementary school where she routinely interacted with children and their families. She was a member of a ward where she was very active. Some of the families at her school or in her ward would have older children who attend BYUI; some of the parents she interacted with a work or church might be professors there. Tammy wasn't invisible, and I just don't see how Chad could think that he couldn't possibly be recognized if he was holding hands with some not-his-wife woman while he was on campus at BYUI. If you're LDS, you'd have to be kookoo to think you can walk onto any campus of BYU and think "I am totally invisible, nobody here could possibly know who I am." If I wanted to be invisible, a campus of BYU is about the last place I'd go. (Not sure I have ever been on campus at BYU since my student days and not run into an old friend, a friend's child, one of my cousin's kids, somebody I knew. It is super common.) And only ONE person would have needed to see Lori and Chad's behavior, only ONE person would have needed to know that Lori wasn't Tammy....I just think there were plenty of people who knew them both who could have been that one person.