Premise: Vitamin B12 , also called cobalamin , is a water-soluble vitamin that has a key role in the normal functioning of the brain and nervous system , and the formation of red blood cells . The vitamer is produced by bacteria as hydroxocobalamin , but conversion between different forms of the vitamin occurs in the body after consumption .
Hypothesis: Vitamin B-12 and cobalamin are two different things.
Label: CONTRADICTION