Let's take an episode of Star Treck for example (have some fun with me

). Captain Picard is captured and replaced with some sort of doppleganger. Eventually the crew grows concerned at his strange actions, and plans a mutiny. They certainly have no right to disobey their captain, or mutiny, but they believe it is the correct thing to do, and we can support their decision since we (the viewers) have a little inside info, but from their point of view it was not as simple as "Do we have the right to do this?" It came down to "What do we think is right? And do we think it right enough that we must force the captain to step down from his view/actions?"
Obviously this example from Star Treck solves the age old disagreement, proving that abortion is wrong.