)In a test of a certain disease, sickness can be detected with atleast 95% accuracy since out of 100 people who were detected sick were actually sick. If sickness does not occur, it can still be detected with a 95% accuracy since out of 100 people 95 were detected to be free of this disease and only 5 people turned out to be sick. A person was detected to have this sickness so he really must be sick.
Which of the following, if true, weakens the argument?
1) Only fat people get such a sickness
2) Other features of this disease have not been tested
3) This type of testing started lately
4) Under normal circumstances, only two people are sick out of 10,000
