I guess the only way, is to offer my verification services, for free of course in this instance.
I will visit RT, and do a thorough inspection, above the waist for sure, but , in case she's a Tgirl , I'll have to Go even further, and using special probing instruments, namely my lips and tongue, determine gender designation by my favourite dining technique.
I will ask RT to log onto MP and ask her to post the secret word that Ursus will send me by PM.