Factual error: First of all, Walt & Bob couldn't be conjoined twins. Conjoined twins have to be identical. While not all identical twins look 100% alike, they still have some similarities. Bob & Walt look nothing alike. Second of all, conjoined twins attached at the liver are the easiest to separate. The liver regenerates, so even if one was left with less, it would still grow back to the correct size. They could've been easily separated.