Actual Error Covariance

Famous quotes containing the words actual and/or error:

    The persons who constitute the natural aristocracy, are not found in the actual aristocracy, or, only on its edge; as the chemical energy of the spectrum is found to be greatest just outside of the spectrum.
    Ralph Waldo Emerson (1803–1882)

    Still we live meanly, like ants; though the fable tells us that we were long ago changed into men; like pygmies we fight with cranes; it is error upon error, and clout upon clout, and our best virtue has for its occasion a superfluous and evitable wretchedness. Our life is frittered away by detail.
    Henry David Thoreau (1817–1862)