Ultimately, it is an exercise that proves often the greatest guile is in simplest task.
This leads to predictions that time proves often as wrong as right.
Both men have proved that often the biggest element in innovation can be in taking away something that seems necessary.
Such unfair taxation can only exist in a place like California, where the government has proved so often that it represents every possible aberration of sane thought.
It is too easy to suggest that Obama's situation is the inverse of NASA's, very pretty and not so successful; better to quote Tom Lehrer's line that "political satire became obsolete when Henry Kissinger was awarded the Nobel Prize," and then contemplate how often that has proved to be nonsense.
Though the cyberweapons creators we investigated have never publicly disclosed this, their digital trails prove that often the malware used to snoop on terrorists and pedophiles is much the same as that used to control partners in abusive relationships.
"The BBC has to prove, quite often, that it can appeal to everybody across the nation," said Grade, speaking at a Broadcasting Press Guild event at Pinewood studios, where he is the chairman.
But by the time Baghdad fell, Rumsfeld believed he had seen his critics proved wrong so often that he had every reason to rely on his instincts.Two weeks before the Iraq invasion, a reporter had asked him, "Can you promise it won't be a quagmire?" "I can almost promise you that someone in this room will say it's a quagmire," Rumsfeld replied.
The history of other entitlement programs, such as Medicare, suggests initial cost estimates often prove overoptimistic, and that could well prove to be true here.
Paul Wong, a local artist whose own edgy mixed media work has often proved controversial, said that Carr "was so much part of our aesthetic landscape that I think we maybe tended to take her for granted".
