pmd, during the time you are with someone, if you can't tell if it is an illusion or real, how can you make the delineation between illusion and reality? If my perception is that it is real at that moment in time, there is no difference to me if it is not.
I tend to think of my hobbying as my own little phenomenological reality... That approach follows the "premise that reality consists of objects and events as they are perceived or understood in human consciousness and not of anything independent of human consciousness."