David Cullinane (Waterford, Sinn Fein) | Oireachtas source

I am sorry, my question is quite distinct and I ask Dr. Holohan to also be distinct. I know it is a complex area but my question is a very simple one. Mr. O'Brien is telling us that this not a perfect science. We accept that. We accept that it is not infallible and that is not a diagnosis. We accept that there is approximately a 30% failure rate, which could include false negatives. However, there is a difference between misreading a smear result and something not being evident. What is the difference between an incorrect reading of a smear test and something which is simply not detectable, which I would imagine would be a false negative? Is there a difference between the two?