Yup, your bad again.
As you know, the more technical term for "outgrowing" in this context is "desisting". And since I know that you're debating in good faith, I know that you'll go back thru the Cass report and read all of the sections that talk about desisting so that you'll be better informed.
Well that sounds like fun! Let's do just that
First we need the Cass report....
Here
And lets look up Desisting...hmmm. Doesn't seem to be much there.
Cass uses a study from the 1980's yes the 80's.
Green, R., Roberts, C. W., Williams, K., Goodman, M., & Mixon, A. (1987). Specific cross-gender behaviour in boyhood and later homosexual orientation.
says that boys with effeminate traits (i.e. playing with dolls) were more likely to identify as cisgender males with same sex-attraction as adults. THE study only used a small number of reports provided by parents and no children were ever directly observed or interviewed. But the thing that really sells this as a legitimate study on transgender youth (something Cass is ever so passionate about) is that none of the children being reported on by parents had ever identified or been identified as transgender.
The Review itself favorably cites research proposing methods that claim to suppress transgender identity in children. So she is claiming that desisting is a common thing while at the same time acknowledging that transgenderism is just suppressed.
Zucker, K. J. (1985). Cross-gender-identified children.
She uses Steensma, T. D., McGuire, J. K., Kreukels, B. P., Beekman, A. J., & Cohen-Kettenis, P. T. (2013). Factors associated with desistence and persistence of childhood gender dysphoria: a quantitative follow-up study. But skipped the part where the researchers said "true cross-gender identification—being a different gender rather than acting like a different gender—is one of the predictors of persistence of gender identity into adulthood."
One thing I found in this mess of a report was that Cass regularly states her opposition to so-called conversion therapy, yet insists that conversion therapy be part of any work with trans youth that she herself does. “In my view, offering treatment (conversion therapy) to a child, either on his or her own or through parental
consent, can be justified for a relatively simple reason. Cross gender identification constitutes a potentially problematic developmental condition. Taken to its extreme, the outcome appears to be transsexualism."
The Review itself favorably cites literature proposing methods that claim to suppress transgender identity in children. So she is claiming that desisting is a common thing while at the same time acknowledging that transgenderism is just suppressed.
Hey that WAS fun.