Just getting into the social networking thing! Didn't realize my network could be this big! =D I like to have fun and laugh. Games and songs make me happiest.
'Cis' is merely an adjective that describes someone whose gender matches their sex. You don't know what 'unfalsifiable' means. You could falsify gender if no one ever felt as if they have a gender identity. It's not unfalsifiable, you just haven't falsified it.
'Cis' is ideological language, signifying belief in the unfalsifiable concept of gender identity. You have a perfect right to believe in unprovable essences that may or may not match the sexed body, but the rest of us have a right to disagree, and to refuse to adopt your jargon.