Why is the ocean blue? Why is Mar red? Why is Donald Trump rich? Why do some people say that he won the debate night?
Human always seeks explanations of everything they see, every fact they get. Logical reasoning leads us to the root-cause reasons of every problem, which is one of the main aptitudes required of every consultant. The PST reflects this fairly well, even featuring an entire question type focused on this aspect of consulting. They provide you with some facts, test your ability to understand them, your logic-backed explanations. Although this 14% of the test becomes sort of bonus questions to score and accelerate on the clock, there is something learning to do!
Shared publicly