Then it's purely Psychological.But if there were a lack of variation, then the Berman series would’ve had to maintain “prop continuity” between an apple in one episode and another one in a different episode. I’m sure the replicator adds reasonable variation and minor imperfections to make the end result feel real, even though you wouldn’t get a rotten apple for no good reason. Same with entire meals: do you go through episodes that feature a particular dish in order to make sure it comes out the same if the order is exactly the same? Not really.