An elderly woman sits in a chair with a book and smiles at the pretty flowers in her room .
It is probably the case that the woman is reading `` The Catch a Mockingbird '' .
It is impossible that the woman is reading `` The Catch a Mockingbird '' .
It is probably the case that the woman is reading `` The Catch a Mockingbird '' .
The woman is reading `` The Catch a Mockingbird '' .