[edsheppa]

a phenomenon called decoherence, according to which interactions between the quantum states of the system of interest and its environment serve to 'collapse' those states into a single outcome.

My understanding is different. Decoherence is interaction with the environment destroying entanglement - in effect, the environment "factors" an entangled quantum state into independent parts. It does not explain how a mixed state "collapses" to a single outcome.

[Old Professer]

This whole mess is B.S.; rather like comparing a telescope to a fishing net.