Professor Does everyone know what alchemy is?

Me Alchemy - the science of understanding, deconstructing and reconstructing matter. However, it is not an all-powerful art. It is impossible to create something out of nothing.

Professor Right, exactly.

Me If one wishes to obtain something, something of equal value must be given. This is the law of equivalent exchange, the basis of all alchemy. In accor-

Professor Okay, thank you.

Me There is a taboo among alchemists! Human transmutation is strictly forbidden, for what-

Professor We got it!

Me FOR WHAT COULD EQUAL THE VALUE OF A HUMAN SOUL?