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For my money she has and will continue to lose credibility (not just for the farcical nature of her fantasy) mainly because any excuse she comes up with about how she always identified with the ethnic group etc as one would say, identify with being gay or transgender, would be marred by (her lies obviously) but by the fact she has had years to 'perfect' the victim of this debacle.
She is an intelligent woman that has come into contact with plenty of 'victims' of race issues and has had all that time to assimilate the countenance and attitude that goes with it.
Coupled with her fantasist mindset I think she may genuinely believe her own lies. If she has planted false memories within her own psyci she may never, without appropriate help, change what she says/thinks.
IF she carry's on with the fantasy as if it were real then tbh on the face of it she would still be a formidable worker in her field but would you trust someone in a high position with fantasistic tendencies?