an EGG, at conception, IS a cell with 46 chromosomes. so we ARE talking about the same thing. cells with 46 chromosomes. all cells in the human body have the complete genetic code for that human (46 chromosomes). a liver cell has the entire code, but only a certain part of the code has been executed. just admit it, and move on already. sheesh. you're being illogical with your refusal to define technically the difference between clump of cells that have divided from one, and an embryo.
An egg can grow into a human being. A liver cell cannot, nor can a stem cell. Comparing the two is a false analogy.