I thought you were a nurse."  She frowned at him, but went to a corner where a small ball of some clear crystalline substance stood.
I thought you worked as a nurse, but I see now that you are a magician.
mnli hypothesis: I thought you worked as a nurse, but I see now that you are a magician. premise: I thought you were a nurse."  She frowned at him, but went to a corner where a small ball of some clear crystalline substance stood.