“Let me be represented as one who trusts his senses, who thinks he knows the things he sees and feels, and entertains no doubts of their existence.” -- Bishop Berkeley
Perhaps that's what they are, in effect, doing. Years ago, I consumed a McRib. Cleverly molded into little pseudo-rib shapes, no bone anywhere. I think they have those things synthesized out of coal tar in one of those German chemical-engineering plants.