Recent quotes:

Soros' Theory of Reflexivity: a critical comment [1] | Cairn.info

George Soros’ central contention, the core of his proposed ‘new paradigm’, is advanced under the head of reflexivity. Human beings, Soros observes, seek both 1) to understand reality and 2) to influence reality. He refers to the former as the cognitive function and to the latter initially as the participating function and, more recently, as the manipulative function. The essential point for Soros is that there is a two way exchange: 1) from reality (including humans and their interactions) to our understanding of it, and 2) from each human being armed with an understanding, back to (the rest of) reality. For Soros the term reflexivity is basically used to express or capture this two way relationship.