4 states of matter?
Let me name every state of matter:
1. Solid
2. Liquid
3. Gas
4. Plasma
5. Supercritical fluid
6. Degenerate matter
7. Bose-Einstein condensate
8. Fermionic condensate
9. Superconductivity
10. Superfluid
11. Supersolid
12. Quantum spin liquid
13. String-net liquid
14. Time crystals
15. Rydberg polaron
16. Black superionic ice
17. Quark-gluon plasma