Positive, negative, margin of error - these are among some of the terms you might hear when you need a medical test to diagnose (or rule out) a health problem. What is the science behind these terms? When might a positive actually be a negative? Can medical language be more contextual, without losing its scientific accuracy? Consultant orthopaedic surgeon Dr Rajesh Singh joins us for a lesson on linguistics and communication. 

Image Credit: 123RF