Notwithstanding the predominant role in academic economic theory that Keynes and Keynesian economics achieved during the twentieth century, his basic… - Alan O. Ebenstein

Hayek opposed not merely Keynes’s policy recommendations, but his technical method.

At the same time, as Hayek maintained elsewhere, the facts of the social sciences do not lend themselves to the same degree of prediction, or explanation, as the facts of the natural sciences—it is for this reason that there are degrees of prediction or explanation. Prediction may be expressed numerically, moreover, “not as a unique value or magnitude but as a range,” narrow in the natural sciences and potentially very broad in the social sciences. In the social sciences, Hayek modified the conception of a numerical range to a “range of phenomena to expect.” This was his concept of pattern prediction, or explanation of the principle, broad, general predictions.

Hayek’s view was that all the knowledge that is possible of a circumstance is a theory of the circumstance—that is, there is no such thing as pure sensation. There is, rather, a theory of sensation.