This argument is valid and every premise is plausible:
- An elementary particle is located at every point where its wavefunction is non-zero.
- An elementary particle is simple.
- A simple located at every point of a region with non-zero volume is an extended simple.
- Typical elementary particles have a wavefunction that is non-zero at every point of a region with non-zero volume.
- So, typical elementary particles are extended simples.