Oh boy, I know this is arrogant; It's pretty easy to show evidence of determinism. 1) Read my brain, check if in ten seconds I will say yes or nothing. 2) Don't tell me. 3) Wait ten seconds. 4) Compare results. I'm aware of the experiments of reading brain decisions faster than our consiousness (machines telling which button we will play "before we realized"). No, no psychomotor tricks. Just read my brain, don't tell me until I made my choice. If you get 100% I believe you, meanwhile, no evidence.