It's almost as important to know that something tried will fail as it is to know it will lead to success. The essential is to try.
That is right, as far as it goes. I read recently (I think it was on Slashdot) that some scientists have said that one reason for humanity's evolutionary success was the fact that we make mistakes. [Edit] It was in Kathryn Schulz's book
Being Wrong: Adventures in the Margin of Error. "The more scientists understand about cognitive functioning, the more it becomes clear that our capacity to make mistakes is utterly inextricable from what makes the human brain so swift, adaptable, and intelligent."
http://science.slashdot.org/story/10/06/20/1722255/Why-Being-Wrong-Makes-Humans-So-SmartHowever, it would be trivially foolish to suppose, because of that, that every attempt, however misguided, is a noble one that deserves to be made. This exchange started because Patio said that a certain specified method of system restoration was "bound to fail". (This is capable of verification). Then you remarked that "those who do not try will always fail". The language is paradoxical. An unmade attempt, cannot, by definition, "fail" or "succeed". However that is a proverb type "wise" saying with stuff implied that roughly means, if I have it right, "those who do not [ever] try [anything] will always fail [to be successful in life]". It would be nonsense to say that someone "fails" to fix their computer if they don't actually try a half-assed method. This isn't cutting-edge research or trying a new design of spear. It's fixing a computer.