Law of Equivalent Exchange

The Law of Equivalent Exchange states that to gain something an equivalent value must be lost. So if the flesh of the body has been made by sand then by transformation can we create the lost limbs.

How can lost things be gained? Just like the nails grow without the human does not it mean it also possible to put back rest of the lost bone to shape. Body a complex set chemical composition with gene structure so complex has puzzled the human exploratory mind for decades. But the creation of something just like nail can also mean the body has the necessary infrastructure in place to create the lost item, it just needs to be activated.

I am not sure where I am going with this. But definitely this is not something impossible to let go.

If the body can get paralysed by a virus does not that mean the reverse engineering of the virus might actually help bring back the body.

All we need is the determination to think beyond!