If two smart people say opposite things about my experiment, I really get triggered to find out who is right and who is less right. That is what happened with this question. Carrying out such experiments is very complex, so the simpler we can make it the better. We already did some simplification iterations, but can we come up with an even simpler setup?
Supposing that the participant can change the wave function: What would be the most simple experiment to verify this?
In our current setup idea, an entanglement source is used. But is this really needed?
Or can a simpler set-up with a photon in superposition suffice, like this one:
So the question is:
Can a set-up with unentangled photons test if the wavefunction can be changed?
This one of the possible answers:
No, a setup only with superposition (no entanglement) is NOT sufficient
'If the superposition collapses to path A it will not interact with the brain and you don't get any information (upper part figure). If the superposition collapses in the brain (lower part figure) you will not get any information from that on path A if there is no entanglement.
So in both situations, you don't get any information if the brain can change the wavefunction; a set-up without entangled photons would not make sense.'
Seems quite plausible, isn't it?
But in another post, I will show you that even another answer to this question should be considered.