"Instead, I should like to put before you a radically different approach to financial markets. It was inspired by Karl Popper who taught me that people’s interpretation of reality never quite corresponds to reality itself. This led me to study the relationship between the two. I found a two-way connection between the participants’ thinking and the situations in which they participate. On the one hand people seek to understand the situation; that is the cognitive function. On the other, they seek to make an impact on the situation; I call that the causative or manipulative function. The two functions connect the thinking agents and the situations in which they participate in opposite directions. In the cognitive function the situation is supposed to determine the participants’ views; in the causative function the participants’ views are supposed to determine the outcome. When both functions are at work at the same time they interfere with each other. The two functions form a circular relationship or feedback loop. I call that feedback loop reflexivity. In a reflexive situation the participants’ views cannot correspond to reality because reality is not something independently given; it is contingent on the participants’ views and decisions. The decisions, in turn, cannot be based on knowledge alone; they must contain some bias or guess work about the future because the future is contingent on the participants’ decisions." - Miguel Caetano from Bookmarklet