There is no shame in not knowing; the shame lies in not finding out.

Erica: If I woulda stayed, I woulda been rich in my twenties. I . . . I mean I could have paid off all my student loans, and I never would have needed to work at that stupid call center. I would have had the time and the means to dedicate to my writing, and my life—it would have been completely different.

Because using information that you have gleaned from a trip to the past to try to fix your life in the present contravenes the rules.