If we will only
allow that, as we progress,
we remain unsure, we will leave opportunities for alternatives. - Richard
P. Feynman
There is nothing
more certain and unchanging than uncertainty and change. - John
Fitzgerald Kennedy
To be absolutely
certain about something, one must know everything or
nothing about it. - Olin Miller
We can be
absolutely certain only about things we do not understand. - Eric
Hoffer
What men really
want is not knowledge but certainty. - Bertrand
Russell
When people are least sure, they are often
most dogmatic. - John Kenneth Galbraith
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