Bad science, Terminator 2/18

"He needs a transfusion."

"Sarah's 0 negative, the universal donor."

"Doesn't matter, he needs at least three units of his own type, AB
negative."

"I don't think you know what a universal donor is."

....


"Test my blood.  Test me."

"No way, John.  He needs AB negative, and for some bizarre reason we've
established that he can't have something compatible and actually needs AB
negative.  Your mother is O negative, and it's impossible for you to have
AB if your mother is O."


This smells a lot like
1) one writer is completely clueless
2) another writer tried to fix it and didn't fix it far enough.
-- 
       Ken Arromdee / arromdee_AT_rahul.net /
http://www.rahul.net/arromdee

"In a superhero story, Superman jumps off buildings and flies. In a
realistic
story, Superman doesn't jump off buildings and can't fly. Deconstruction
is
writing a story where Superman can't fly but he still jumps off of
buildings."