text: can a dna test be wrong?   i hope so.? i know they say it's an accurate test, but think about this...  if you tested every single man in this world to be your dad, except your dad (that you know is yours), i bet one of them would match as your father, even though they aren't. it seems like it would be possible to share dna, because this world is a big place. just curious. anyone agree with me?  thanks for answers. actually, if the lab who does the testing is processing a lot of samples it is likely that once in a while samples may get mixed up by mistake.