In reply to Tomás Cámara.

Thank you, Tomás, for your comment. Mathematicians are also humans. They love, they laugh, they err, and they are mortal. They live by delusional rules of logic which sometimes lead them to a dead end. In the real world of relativity, what once considered to be a "settled science" some day may become a prejudice. It is not frustrating when one's beliefs get dispelled the day after passing away, it would have been frustrating when it happened the day before...