Quantum Mechanics
Uncertainty
Quantum mechanics tells us that the physical world is more uncertain than previously believed (by scientists), but this uncertainty is up until now mostly confined to laboratories and to the minds that run them. From any given vantage point the world is more or less certain depending on who you are and your particular experience with reality, which includes the culture you were brought up in. The rising and the setting of the sun, the placement of a non volcanic mountain from one day to the next, the cardinal directions, and gravity are all things that we can rely upon, after all the chief characteristic of the earth element is stability. But as the tai ji symbol teaches us, there is always yin within yang and yang within yin. Even a mountain changes, the earth shakes, the sun will eventually not rise, and the possibility exists (even from a western science perspective) that a person can walk straight through a wall to the other side. What is deemed certain or uncertain may be accurate or may not be. Uncertainty after all only arises through not knowing. Perhaps there is someone on earth who knew when and where I would meet my wife. What does that say about uncertainty?

Causality
Causality is quite similar to uncertainty. Just as many things seem relatively certain many things also seem to be easily connected to a particular cause. If someone falls and hits their head against a wall then the bump that arises was probably not due to something that they ate. If I then ask why they fell in the first place then that quickly becomes complicated, as I must consider why they were not paying attention, why they were at that particular place at that particular time and on and on and on. Causality quickly becomes messy. There are thousands, if not millions of influences on us at any given time, who is to say how they conspire and who has the strongest tug?

Is the world Wierd?
There are two types of wierd. Wierd cool and wierd not cool.