Sane and rational

     A friend is being harassed and tormented by her former sister-in-law.
     "She was recently diagnosed with multiple personalities," my friend told me, "so you know she is neither sane nor rational."
     I didn't know what to say. She doesn't know about us. So I said, "No, of course she isn't."
     In other words, I betrayed myself. I have multiple personalities and I feel perfectly sane and rational.
     At the moment.