In the ‘pick a button and tell me the letter that is showing when you pick’ experiment some time-gap existed between the neurological signifier of the chosen button and the subject’s reported ‘moment of choice’. What would happen if the procedure were accelerated to the point that there were less time available to the subject to make a choice than the slowest observed delay? Would the subject then be unable to make any choices? Would they still choose but not feel like they are choosing freely?
Also, if the subject were told what their brain activity was predicting would they be able to ‘change their mind’ and click the other button? Or would it be too late and the subject would then experience their finger pressing a button against their ‘will’?