You are replacing a doctor, charged to find who, among the three patients, is the one that is contaminated. To do this, you can use a whole range of experiments to be performed on the sick. You can also ask the guard to do the dirty work for you.

You are replacing a doctor, charged to find who, among the three patients, is the one that is contaminated. To do this, you can use a whole range of experiments to be performed on the sick. You can also ask the guard to do the dirty work for you.