Double-slit device is but a wave detector than a bullet hole counter. Shooting particles to study their properties is intrusive experiment. The difficulty is not only studying particle in translation, but keeping it still is not any easier. The device falls short of identifying a particle and it's bullet hole. A 1/30,000 second of light flash is about 1 km (3,280 ft) beam of waves in length. However, we don't really know how many particles have been sent at a single shot. The identity of particle is lost.

A particle is considered point-like, and it's trajectory line-like. It can only physically strike the sensor once. On the other hand, it's broadcasting of waves is a sweep. It can be at many places at a time by propagating into the surroundings. Yet, particles can rest and never vanish, however, wave has to continue to spread and die out eventually. A visible structure is a collection of invisible particles. It has to inherit the underlaying properties of particles without any contradiction. Particles are micro bullets in double-slit device. Can they behave differently from real bullets, or cannon balls?

Above all, the rest of the universe (or environment) is the absolute complement of an object. Even a particle, it is impossible for it to be anywhere else at the same time, since anywhere else is it's absolute complement. The truth is, action of an object will disturb it's complement, and vise versa. This interaction of an object and it's complement is visible in countless natural phenomena, e.g. a synchronized swimmer and her team in water, one sardine and it's school in ocean, and so on.

Particle and wave are fundamentally different. Particle is mass of distinct entity, and wave is the reaction of it's complement, which is wide and complex. The participating entities and their actions can not be fully identified. Nonetheless, particle and wave are separate entities. Isn't it scientifically essential to differentiate particle and wave?