The other day when work ended, rather than go to my car and drive home as I have every day for the last four years, I just sat outside the building for no reason at all. Maybe I didn't want to go home just yet; maybe I was tired; maybe this maybe that. I sat for about 30 minutes, almost without moving, before finally leaving. I was thinking and thinking about why I did it, and then I started to wonder why I felt anxious about not being able to answer the question. Is it possible we've all been brainwashed into accepting the - if I remember this correctly - "principle of sufficient reason" (assuming this states that all things happen for a reason). Is it possible I sat down for no reason at all?