Subjective probability: A person's belief about the probability of some event E that is measured and indicated by the betting odds the person is willing to accept for E.
The term 'subjective probability' is used in this Dictionary in conformity with the subjective interpretation of probability, which holds that probabilities are degrees of belief of persons that conform to the calculus of probabilities, and that can be found by asking persons what betting odds they are willing to accept.
There is a related notion, namely personal probability, which is not wedded to the subjective interpretation of probability.
