Could we get quantum spookiness even without entanglement?

Particles of light travelling through a maze of devices seem to have passed a famous test for entanglement – without being entangled at all

​Particles of light travelling through a maze of devices seem to have passed a famous test for entanglement – without being entangled at all Particles of light travelling through a maze of devices seem to have passed a famous test for entanglement – without being entangled at all