Ockham's razor in interval identification (Q1904305)

It is shown that William of Ockham's razor principle from the year 1320 (``Entities should not be multiplied unnecessarily'') can lead to a natural criterion for choosing the model of correspondence between the real value of physical parameter and the interval of possible values. The problem is that the real-life measurements cannot be precise and we never know the precise value of a quantity. Only an interval of its possible values is defined. As a result there are several different models that are consistent with the same measurement results. The presented criterion of choosing a model is applied to data processing, which is related to a reasonable simple psychological problem.