ABSTRACT
We all use probability and related ideas all the time. To explain and relate all these applications we shall need to regiment our presentation of them in one or two ways. One is by ignoring trivial verbal variations, such as the use of ‘likely’ for ‘probable’. Another and more important way is by classifying probabilities into three basic kinds: physical, epistemic and subjective. Physical probabilities will, for brevity, also be called chances and subjective probabilities credences.
