Observation Wheel

Famous quotes containing the words observation and/or wheel:

“There are three principal means of acquiring knowledge available to us: observation of nature, reflection, and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination. Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.”
—Denis Diderot (1713–1784)

“A wheel that can be turned though nothing else moves with it, is not a part of the mechanism.”
—Ludwig Wittgenstein (1889–1951)