I witnessed an event yesterday that reminded me of CATCH 22. A psychiatrist asked a patient if she would consider a life-extending but invasive process. She at first said no. He asked why and she said it was prolonging an inevitable decline and she didn't want that. He talked with her for some time and then asked again if she would consider the treatment. She said she would consider it. He then informed her that she was competent, since she'd given the "right" answer. His word.
So, Catch 22: if you give the right answer, you're sane and you have to live longer than you would have chosen to. If you give the wrong answer, you're crazy, and they can override your decision. Hmmm. Something just doesn't feel right about that.