I don't think the real question was whether Chappaquiddick Ted truly validly married Joan. It was clearly beyond him psychologically to enter into a valid marriage. One must be able to form clearly in one’s mind ideas like “monogamy,” “fidelity,” “sobriety,” “obligation,” “duty,” and “chastity” if one is to marry validly.
The REAL question was why the Church subsequently permitted him to attempt a second marriage. I have heard of annulment cases where at least one party to the putative, but ultimately declared null, marriage, was not permitted to again re-attempt sacramental marriage because of the psychological impediments that continued to exist in that party..
sitetest
That would seem like a no-brainer. I've wondered why a person considered incompetent to receive the Sacrament of Matrimony the first time automatically becomes competent the next time ... absent a clear conversion.