The universe ain't logical in many respects. Let's look at the following logical construct. A is some property B is some other property The first rule is that any object having property A does not have property B, and vice versa. So the properties A and B are mutually exclusive. So, this means that for any object, it can have property A, or property B, or none. But it can't have property A and B simultaniously. Now let's try this logic for the universe. Let A be the particle property (having momentum), and let B be the wave property (haveing wavelength). These properties are mutually exclusive. An electron or other small particles however have shown to have both particle property as wave property. It seems the universe at fundamental levels isn't working logically.