Take the difference between falsificationism and hermeneutics.

Falsificationism (à la Popper and Harper) focuses on the context of justification, which in the market process concerns weeding out rival conjectures that are already formed. Hermeneutics (à la Gadamer and Lachmann) on the other hand, is better suited to elaborate the context of discovery, which in the market process can concern how novel ‘conjectures’ are developed, typically as an unintended consequence of normal social ‘dialogue’.

It is no exaggeration to say that Hayek was interested in both these aspects of human action. That being said, I would not go so far as to call Hayek a hermeneuticist, and certainly not a ‘pomo’. However, statements like the ones below should be enough to make even the most ardent realist wonder:

“My gain from hearing or reading what other people thought was that it changed, as it were, the colors of my own concepts. What I heard or read did not enable me to reproduce their thought but altered my thought. I would not retain their ideas or concepts but modify the relations between my own” (Two Types of Mind pp. 52-53)

“Whenever we study qualitative difference between experiences we are studying
mental and not physical events, and much that we believe to know about the external world
is, in fact, knowledge about ourselves” (The Sensory Order”, pp.6-7)

Doesn’t the phrase “… the colors of my own concepts” have a distinctly ‘pomo’ ring (color?) to it? Both quotes smack a bit of hermeneutics and social constructionism as well. This should, of course, come as no surprise given that Berger and Luchmann were students of Alfred Schütz.