P1) If there is not a known symmetry-breaker between identified, transitioned trans people and identified, de-transitioned trans people, then we do not have epistemic access to the means of parsing legitimate trans people from illegitimate trans people.
(¬P→¬Q)
P2) If we do not have epistemic access to the means of parsing legitimate trans people from illegitimate trans people, then there is not a clear epistemically virtuous reason to accept the legitimacy of trans identity.
(¬Q→¬R)
P3) There is not a known symmetry-breaker between identified, transitioned trans people and identified, de-transitioned trans people.
(¬P)
C) Therefore, there is not a clear epistemically virtuous reason to accept the legitimacy of trans identity.
(∴¬R)