A philosophy professor walks in to give his class their final. Placing his chair on his desk the professor instructs the class, "Using every applicable thing you've learned in this course, prove to me that this chair DOES NOT EXIST."
So, pencils are writing and erasers are erasing, students are preparing to embark on novels proving that this chair doesn't exist, except for one student. He spends thirty seconds writing his answer, then turns his final in to the astonishment of his peers.
Time goes by, and the day comes when all the students get their final grades ... and to the amazment of the class, the student who wrote for thirty seconds gets the highest grade in the class.
One evening a family brings their frail, elderly mother to a nursing home and leaves her, hoping she will be well cared for. The next morning, the nurses bathe her, feed her a tasty breakfast, and set her in a chair at a window overlooking a lovely flower garden.
She seems ok, but after a while she slowly starts to lean over sideways in her chair. Two attentive nurses immediately rush up to catch her and straighten her up. Again she seems OK, but after a while she starts to tilt to the other side. The nurses rush back and once more bring her back upright. This goes on all morning. Later the family arrives to see how the old woman is adjusting to her new home. "So Ma, how is it here? Are they treating you all right?" they ask.
"It's pretty nice," she replies. "Except they won't let you fart."