Those who warn of demographic upheaval frame their predictions as if they were based on medical evidence. But they are not talking about a mastectomy, they are talking about cutting out Israel's heart.
Moshe Arens..
Haaretz..
18 June '13..
Angelina Jolie decided to have a preventive double mastectomy performed after she was informed by her doctor that there was an 87% risk that she would, in time, develop breast cancer, since her genome had a mutation of the BRCA1 gene. The generally accepted opinion nowadays is that women carrying this gene have an 80% risk of developing breast cancer by the age of 90.
We can all sympathize with her having to take such a horrendously difficult decision based on a probabilistic estimate. She could have decided to gamble on the chance that possibly she was part of the 13% who would not develop the disease even though she had that gene mutation. But she decided to play it safe − better safe than sorry.
All gamblers know how difficult it is to take a decision on a single roll of the dice, even though the probabilities of the different outcomes are well known. It is an entirely different situation when we are dealing with a large number of repetitive events in which the individual probabilities are known.
The resulting average of many events is known to be the probabilistic expectation. This is the result of the Law of Large Numbers, and even casino operators who have not studied mathematics know it. So do people in the insurance business who base the rates they set for insurance policies on their analysis of a large mass of statistical data, from which the average to be expected from a large number of similar events can be deduced. Under these circumstances, the decisions are easy.
Can we make rational decisions based on probabilistic forecasts regarding a single event, like Angelina Jolie did? If the outcome is of no great consequence, why not? You win some, you lose some.
Now What?
1 year ago









