The smell of subjectivity clings to the mechanical definition of complexity as stubbornly as it sticks to the definition of information.

Time has been called God's way of making sure that everything doesn't happen at once. In the same spirit, noise is Nature's way of making sure that we don't find out everything that happens. Noise, in short, is the protector of information.

Information gently but relentlessly drizzles down on us in an invisible, impalpable electric rain.

In fact, an information theory that leaves out the issue of noise turns out to have no content.

If the intensity of the material world is plotted along the horizontal axis, and the response of the human mind is on the vertical, the relation between the two is represented by the logarithmic curve. Could this rule provide a clue to the relationship between the objective measure of information, and our subjective perception of it?

Numbers instill a feeling for the lie of the land, and furnish grist for the mathematical mill that is the physicist's principal tool.

The problem of defining exactly what is meant by the signal velocity, which cropped up as long ago as 1907, has not been solved.