Ouija boards can affect outcome, for example one person can influence what others will see and if they believe it suddenly that person's opinion will matter muc

Ouija boards can affect outcome, for example one person can influence what others will see and if they believe it suddenly that person's opinion will matter much more than it should. Instead of having a pointless arguments whether Ouija board can talk to dead people (see other comments), much easier is to assume it does and apply existing rules to rule it out. I think there is no doubt that it can affect outcome.